13021211221031 has 4 divisors (see below), whose sum is σ = 14022842853432. Its totient is φ = 12019579588632.

The previous prime is 13021211221027. The next prime is 13021211221033. The reversal of 13021211221031 is 13012211212031.

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

It is a cyclic number.

It is not a de Polignac number, because 13021211221031 - 2² = 13021211221027 is a prime.

It is a super-2 number, since 2×13021211221031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13021211220994 and 13021211221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021211221033) 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, 500815816181 + ... + 500815816206.

It is an arithmetic number, because the mean of its divisors is an integer number (3505710713358).

Almost surely, 2^{13021211221031} is an apocalyptic number.

13021211221031 is a deficient number, since it is larger than the sum of its proper divisors (1001631632401).

13021211221031 is a wasteful number, since it uses less digits than its factorization.

13021211221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001631632400.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 13021211221031 its reverse (13012211212031), we get a palindrome (26033422433062).

The spelling of 13021211221031 in words is "thirteen trillion, twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, thirty-one".