131000042009987 has 2 divisors, whose sum is σ = 131000042009988. Its totient is φ = 131000042009986.

The previous prime is 131000042009951. The next prime is 131000042010041. The reversal of 131000042009987 is 789900240000131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131000042009987 - 2⁶ = 131000042009923 is a prime.

It is a super-2 number, since 2×131000042009987² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131000042009917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65500021004993 + 65500021004994.

It is an arithmetic number, because the mean of its divisors is an integer number (65500021004994).

Almost surely, 2^{131000042009987} is an apocalyptic number.

131000042009987 is a deficient number, since it is larger than the sum of its proper divisors (1).

131000042009987 is an equidigital number, since it uses as much as digits as its factorization.

131000042009987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 131000042009987 in words is "one hundred thirty-one trillion, forty-two million, nine thousand, nine hundred eighty-seven".