13231331002121 has 4 divisors (see below), whose sum is σ = 13480978756932. Its totient is φ = 12981683247312.

The previous prime is 13231331002111. The next prime is 13231331002129. The reversal of 13231331002121 is 12120013313231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10570073857225 + 2661257144896 = 3251165^2 + 1631336^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231331002121 - 2²² = 13231326807817 is a prime.

It is a super-2 number, since 2×13231331002121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13231331002129) 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, 124823877326 + ... + 124823877431.

It is an arithmetic number, because the mean of its divisors is an integer number (3370244689233).

Almost surely, 2^{13231331002121} is an apocalyptic number.

It is an amenable number.

13231331002121 is a deficient number, since it is larger than the sum of its proper divisors (249647754811).

13231331002121 is an equidigital number, since it uses as much as digits as its factorization.

13231331002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249647754810.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 13231331002121 its reverse (12120013313231), we get a palindrome (25351344315352).

The spelling of 13231331002121 in words is "thirteen trillion, two hundred thirty-one billion, three hundred thirty-one million, two thousand, one hundred twenty-one".