1300123221021 has 12 divisors (see below), whose sum is σ = 1928711325372. Its totient is φ = 843323170176.

The previous prime is 1300123221017. The next prime is 1300123221029. The reversal of 1300123221021 is 1201223210031.

1300123221021 is a `hidden beast` number, since 1 + 300 + 12 + 322 + 10 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1172642088996 + 127481132025 = 1082886^2 + 357045^2 .

It is not a de Polignac number, because 1300123221021 - 2² = 1300123221017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1300123220985 and 1300123221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1300123221029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1952136636 + ... + 1952137301.

It is an arithmetic number, because the mean of its divisors is an integer number (160725943781).

Almost surely, 2^{1300123221021} is an apocalyptic number.

It is an amenable number.

1300123221021 is a deficient number, since it is larger than the sum of its proper divisors (628588104351).

1300123221021 is a wasteful number, since it uses less digits than its factorization.

1300123221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904273980 (or 3904273977 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1300123221021 its reverse (1201223210031), we get a palindrome (2501346431052).

It can be divided in two parts, 1300 and 123221021, that added together give a palindrome (123222321).

The spelling of 1300123221021 in words is "one trillion, three hundred billion, one hundred twenty-three million, two hundred twenty-one thousand, twenty-one".