213131210230969 has 2 divisors, whose sum is σ = 213131210230970. Its totient is φ = 213131210230968.

The previous prime is 213131210230943. The next prime is 213131210231041. The reversal of 213131210230969 is 969032012131312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211934286709369 + 1196923521600 = 14557963^2 + 1094040^2 .

It is a cyclic number.

It is not a de Polignac number, because 213131210230969 - 2⁹ = 213131210230457 is a prime.

It is a super-2 number, since 2×213131210230969² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213131210230909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565605115484 + 106565605115485.

It is an arithmetic number, because the mean of its divisors is an integer number (106565605115485).

Almost surely, 2^{213131210230969} is an apocalyptic number.

It is an amenable number.

213131210230969 is a deficient number, since it is larger than the sum of its proper divisors (1).

213131210230969 is an equidigital number, since it uses as much as digits as its factorization.

213131210230969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 43.

The spelling of 213131210230969 in words is "two hundred thirteen trillion, one hundred thirty-one billion, two hundred ten million, two hundred thirty thousand, nine hundred sixty-nine".