1020112321 has 4 divisors (see below), whose sum is σ = 1022656644. Its totient is φ = 1017568000.

The previous prime is 1020112279. The next prime is 1020112339. The reversal of 1020112321 is 1232110201.

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 759774096 + 260338225 = 27564^2 + 16135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020112321 - 2¹⁹ = 1019588033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020112391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271560 + ... + 1272361.

It is an arithmetic number, because the mean of its divisors is an integer number (255664161).

Almost surely, 2^1020112321 is an apocalyptic number.

It is an amenable number.

1020112321 is a deficient number, since it is larger than the sum of its proper divisors (2544323).

1020112321 is an equidigital number, since it uses as much as digits as its factorization.

1020112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544322.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1020112321 is about 31939.1972504006. The cubic root of 1020112321 is about 1006.6596575076.

Adding to 1020112321 its reverse (1232110201), we get a palindrome (2252222522).

It can be divided in two parts, 10201 and 12321, that multiplied together give a palindrome (125686521).

The spelling of 1020112321 in words is "one billion, twenty million, one hundred twelve thousand, three hundred twenty-one".