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BaseRepresentation
bin11110000000110011010…
…00100111110100110001
310122120202122120001122211
433000121220213310301
5113343420342332241
62105423103132121
7134334435221413
oct17003150476461
93576678501584
101031222230321
11368380079728
12147a362a4041
137632293973a
1437ca8d2a9b3
151bc5781c781
hexf019a27d31

1031222230321 has 4 divisors (see below), whose sum is σ = 1032584479732. Its totient is φ = 1029859980912.

The previous prime is 1031222230307. The next prime is 1031222230331. The reversal of 1031222230321 is 1230322221301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 885313509921 + 145908720400 = 940911^2 + 381980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031222230321 - 27 = 1031222230193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031222230292 and 1031222230301.

It is not an unprimeable number, because it can be changed into a prime (1031222230331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681123570 + ... + 681125083.

It is an arithmetic number, because the mean of its divisors is an integer number (258146119933).

Almost surely, 21031222230321 is an apocalyptic number.

It is an amenable number.

1031222230321 is a deficient number, since it is larger than the sum of its proper divisors (1362249411).

1031222230321 is an equidigital number, since it uses as much as digits as its factorization.

1031222230321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362249410.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1031222230321 its reverse (1230322221301), we get a palindrome (2261544451622).

The spelling of 1031222230321 in words is "one trillion, thirty-one billion, two hundred twenty-two million, two hundred thirty thousand, three hundred twenty-one".

Divisors: 1 757 1362248653 1031222230321