22131221352131 has 2 divisors, whose sum is σ = 22131221352132. Its totient is φ = 22131221352130.

The previous prime is 22131221352127. The next prime is 22131221352217. The reversal of 22131221352131 is 13125312213122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22131221352131 - 2² = 22131221352127 is a prime.

It is a super-2 number, since 2×22131221352131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22131221352094 and 22131221352103.

It is not a weakly prime, because it can be changed into another prime (22131221352101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065610676065 + 11065610676066.

It is an arithmetic number, because the mean of its divisors is an integer number (11065610676066).

Almost surely, 2^{22131221352131} is an apocalyptic number.

22131221352131 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131221352131 is an equidigital number, since it uses as much as digits as its factorization.

22131221352131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

Adding to 22131221352131 its reverse (13125312213122), we get a palindrome (35256533565253).

The spelling of 22131221352131 in words is "twenty-two trillion, one hundred thirty-one billion, two hundred twenty-one million, three hundred fifty-two thousand, one hundred thirty-one".