13021323122021 has 4 divisors (see below), whose sum is σ = 13123853225472. Its totient is φ = 12918793018572.

The previous prime is 13021323122009. The next prime is 13021323122023. The reversal of 13021323122021 is 12022132312031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13021323122021 - 2⁴² = 8623276610917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021323122023) 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, 51265051535 + ... + 51265051788.

It is an arithmetic number, because the mean of its divisors is an integer number (3280963306368).

Almost surely, 2^{13021323122021} is an apocalyptic number.

It is an amenable number.

13021323122021 is a deficient number, since it is larger than the sum of its proper divisors (102530103451).

13021323122021 is a wasteful number, since it uses less digits than its factorization.

13021323122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102530103450.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 13021323122021 its reverse (12022132312031), we get a palindrome (25043455434052).

The spelling of 13021323122021 in words is "thirteen trillion, twenty-one billion, three hundred twenty-three million, one hundred twenty-two thousand, twenty-one".