13121021221052 has 24 divisors (see below), whose sum is σ = 23960926703616. Its totient is φ = 6275061234288.

The previous prime is 13121021221039. The next prime is 13121021221069. The reversal of 13121021221052 is 25012212012131.

It is a super-2 number, since 2×13121021221052² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400613 + ... + 5138339.

It is an arithmetic number, because the mean of its divisors is an integer number (998371945984).

Almost surely, 2^{13121021221052} is an apocalyptic number.

It is an amenable number.

13121021221052 is a deficient number, since it is larger than the sum of its proper divisors (10839905482564).

13121021221052 is a wasteful number, since it uses less digits than its factorization.

13121021221052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4767857 (or 4767855 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 13121021221052 its reverse (25012212012131), we get a palindrome (38133233233183).

The spelling of 13121021221052 in words is "thirteen trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-one thousand, fifty-two".