101987842531 has 2 divisors, whose sum is σ = 101987842532. Its totient is φ = 101987842530.

The previous prime is 101987842487. The next prime is 101987842589. The reversal of 101987842531 is 135248789101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101987842531 - 2⁷ = 101987842403 is a prime.

It is a super-2 number, since 2×101987842531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101987849531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50993921265 + 50993921266.

It is an arithmetic number, because the mean of its divisors is an integer number (50993921266).

Almost surely, 2^101987842531 is an apocalyptic number.

101987842531 is a deficient number, since it is larger than the sum of its proper divisors (1).

101987842531 is an equidigital number, since it uses as much as digits as its factorization.

101987842531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 101987842531 in words is "one hundred one billion, nine hundred eighty-seven million, eight hundred forty-two thousand, five hundred thirty-one".