131211132989 has 2 divisors, whose sum is σ = 131211132990. Its totient is φ = 131211132988.

The previous prime is 131211132961. The next prime is 131211133037. The reversal of 131211132989 is 989231112131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112419384100 + 18791748889 = 335290^2 + 137083^2 .

It is an emirp because it is prime and its reverse (989231112131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131211132989 - 2²⁰ = 131210084413 is a prime.

It is a super-2 number, since 2×131211132989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131211132089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605566494 + 65605566495.

It is an arithmetic number, because the mean of its divisors is an integer number (65605566495).

Almost surely, 2^131211132989 is an apocalyptic number.

It is an amenable number.

131211132989 is a deficient number, since it is larger than the sum of its proper divisors (1).

131211132989 is an equidigital number, since it uses as much as digits as its factorization.

131211132989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 41.

The spelling of 131211132989 in words is "one hundred thirty-one billion, two hundred eleven million, one hundred thirty-two thousand, nine hundred eighty-nine".