131222400079 has 2 divisors, whose sum is σ = 131222400080. Its totient is φ = 131222400078.

The previous prime is 131222400031. The next prime is 131222400139. The reversal of 131222400079 is 970004222131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131222400079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131222400079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131222460079) 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, 65611200039 + 65611200040.

It is an arithmetic number, because the mean of its divisors is an integer number (65611200040).

Almost surely, 2^131222400079 is an apocalyptic number.

131222400079 is a deficient number, since it is larger than the sum of its proper divisors (1).

131222400079 is an equidigital number, since it uses as much as digits as its factorization.

131222400079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 131222400079 in words is "one hundred thirty-one billion, two hundred twenty-two million, four hundred thousand, seventy-nine".