131012221402691 has 2 divisors, whose sum is σ = 131012221402692. Its totient is φ = 131012221402690.

The previous prime is 131012221402669. The next prime is 131012221402721. The reversal of 131012221402691 is 196204122210131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131012221402691 - 2³⁴ = 130995041533507 is a prime.

It is not a weakly prime, because it can be changed into another prime (131012221402631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65506110701345 + 65506110701346.

It is an arithmetic number, because the mean of its divisors is an integer number (65506110701346).

Almost surely, 2^{131012221402691} is an apocalyptic number.

131012221402691 is a deficient number, since it is larger than the sum of its proper divisors (1).

131012221402691 is an equidigital number, since it uses as much as digits as its factorization.

131012221402691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 131012221402691 in words is "one hundred thirty-one trillion, twelve billion, two hundred twenty-one million, four hundred two thousand, six hundred ninety-one".