12210023131981 has 2 divisors, whose sum is σ = 12210023131982. Its totient is φ = 12210023131980.

The previous prime is 12210023131949. The next prime is 12210023132029. The reversal of 12210023131981 is 18913132001221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8745712009225 + 3464311122756 = 2957315^2 + 1861266^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210023131981 - 2⁵ = 12210023131949 is a prime.

It is a super-2 number, since 2×12210023131981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12210023111981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105011565990 + 6105011565991.

It is an arithmetic number, because the mean of its divisors is an integer number (6105011565991).

Almost surely, 2^{12210023131981} is an apocalyptic number.

It is an amenable number.

12210023131981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210023131981 is an equidigital number, since it uses as much as digits as its factorization.

12210023131981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 12210023131981 in words is "twelve trillion, two hundred ten billion, twenty-three million, one hundred thirty-one thousand, nine hundred eighty-one".