13021000232231 has 4 divisors (see below), whose sum is σ = 13021007820912. Its totient is φ = 13020992643552.

The previous prime is 13021000232189. The next prime is 13021000232237. The reversal of 13021000232231 is 13223200012031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13021000232231 is a prime.

It is a super-2 number, since 2×13021000232231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021000232237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137615 + ... + 5104991.

It is an arithmetic number, because the mean of its divisors is an integer number (3255251955228).

Almost surely, 2^{13021000232231} is an apocalyptic number.

13021000232231 is a deficient number, since it is larger than the sum of its proper divisors (7588681).

13021000232231 is an equidigital number, since it uses as much as digits as its factorization.

13021000232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7588680.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13021000232231 its reverse (13223200012031), we get a palindrome (26244200244262).

The spelling of 13021000232231 in words is "thirteen trillion, twenty-one billion, two hundred thirty-two thousand, two hundred thirty-one".