13213214129981 has 2 divisors, whose sum is σ = 13213214129982. Its totient is φ = 13213214129980.

The previous prime is 13213214129923. The next prime is 13213214130007. The reversal of 13213214129981 is 18992141231231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10646457677881 + 2566756452100 = 3262891^2 + 1602110^2 .

It is a cyclic number.

It is not a de Polignac number, because 13213214129981 - 2¹⁸ = 13213213867837 is a prime.

It is a super-2 number, since 2×13213214129981² (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 (13213214129281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6606607064990 + 6606607064991.

It is an arithmetic number, because the mean of its divisors is an integer number (6606607064991).

Almost surely, 2^{13213214129981} is an apocalyptic number.

It is an amenable number.

13213214129981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13213214129981 is an equidigital number, since it uses as much as digits as its factorization.

13213214129981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 47.

The spelling of 13213214129981 in words is "thirteen trillion, two hundred thirteen billion, two hundred fourteen million, one hundred twenty-nine thousand, nine hundred eighty-one".