13312232121021 has 16 divisors (see below), whose sum is σ = 17794247178624. Its totient is φ = 8852527563264.

The previous prime is 13312232121007. The next prime is 13312232121029. The reversal of 13312232121021 is 12012123221331.

It is not a de Polignac number, because 13312232121021 - 2⁵ = 13312232120989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13312232120982 and 13312232121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13312232121029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5375280 + ... + 7451046.

It is an arithmetic number, because the mean of its divisors is an integer number (1112140448664).

Almost surely, 2^{13312232121021} is an apocalyptic number.

It is an amenable number.

13312232121021 is a deficient number, since it is larger than the sum of its proper divisors (4482015057603).

13312232121021 is a wasteful number, since it uses less digits than its factorization.

13312232121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081140.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 13312232121021 its reverse (12012123221331), we get a palindrome (25324355342352).

The spelling of 13312232121021 in words is "thirteen trillion, three hundred twelve billion, two hundred thirty-two million, one hundred twenty-one thousand, twenty-one".