12021021313 has 16 divisors (see below), whose sum is σ = 13895925120. Its totient is φ = 10185840000.

The previous prime is 12021021293. The next prime is 12021021329. The reversal of 12021021313 is 31312012021.

It is not a de Polignac number, because 12021021313 - 2⁹ = 12021020801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021021713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453013 + ... + 478813.

It is an arithmetic number, because the mean of its divisors is an integer number (868495320).

Almost surely, 2^12021021313 is an apocalyptic number.

It is an amenable number.

12021021313 is a deficient number, since it is larger than the sum of its proper divisors (1874903807).

12021021313 is a wasteful number, since it uses less digits than its factorization.

12021021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26568.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12021021313 its reverse (31312012021), we get a palindrome (43333033334).

The spelling of 12021021313 in words is "twelve billion, twenty-one million, twenty-one thousand, three hundred thirteen".