131211323279 has 2 divisors, whose sum is σ = 131211323280. Its totient is φ = 131211323278.

The previous prime is 131211323249. The next prime is 131211323351. The reversal of 131211323279 is 972323112131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131211323279 is a prime.

It is a super-2 number, since 2×131211323279² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131211323249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605661639 + 65605661640.

It is an arithmetic number, because the mean of its divisors is an integer number (65605661640).

Almost surely, 2^131211323279 is an apocalyptic number.

131211323279 is a deficient number, since it is larger than the sum of its proper divisors (1).

131211323279 is an equidigital number, since it uses as much as digits as its factorization.

131211323279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The spelling of 131211323279 in words is "one hundred thirty-one billion, two hundred eleven million, three hundred twenty-three thousand, two hundred seventy-nine".