13121021323020 has 96 divisors (see below), whose sum is σ = 39565548868608. Its totient is φ = 3229739004672.

The previous prime is 13121021323013. The next prime is 13121021323037. The reversal of 13121021323020 is 2032312012131.

It is a super-2 number, since 2×13121021323020² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82293817 + ... + 82453103.

It is an arithmetic number, because the mean of its divisors is an integer number (412141134048).

Almost surely, 2^{13121021323020} is an apocalyptic number.

13121021323020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121021323020 is an abundant number, since it is smaller than the sum of its proper divisors (26444527545588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13121021323020 is a wasteful number, since it uses less digits than its factorization.

13121021323020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264919 (or 264917 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 13121021323020 its reverse (2032312012131), we get a palindrome (15153333335151).

The spelling of 13121021323020 in words is "thirteen trillion, one hundred twenty-one billion, twenty-one million, three hundred twenty-three thousand, twenty".