13121311032021 has 32 divisors (see below), whose sum is σ = 18601844227200. Its totient is φ = 8198541066240.

The previous prime is 13121311032007. The next prime is 13121311032059. The reversal of 13121311032021 is 12023011312131.

It is not a de Polignac number, because 13121311032021 - 2¹³ = 13121311023829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121311032091) 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 31 ways as a sum of consecutive naturals, for example, 11746101 + ... + 12814581.

It is an arithmetic number, because the mean of its divisors is an integer number (581307632100).

Almost surely, 2^{13121311032021} is an apocalyptic number.

It is an amenable number.

13121311032021 is a deficient number, since it is larger than the sum of its proper divisors (5480533195179).

13121311032021 is a wasteful number, since it uses less digits than its factorization.

13121311032021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069509.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 13121311032021 its reverse (12023011312131), we get a palindrome (25144322344152).

The spelling of 13121311032021 in words is "thirteen trillion, one hundred twenty-one billion, three hundred eleven million, thirty-two thousand, twenty-one".