100561056031 has 2 divisors, whose sum is σ = 100561056032. Its totient is φ = 100561056030.

The previous prime is 100561055999. The next prime is 100561056091. The reversal of 100561056031 is 130650165001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100561056031 - 2⁵ = 100561055999 is a prime.

It is a super-3 number, since 3×100561056031³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100561056091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50280528015 + 50280528016.

It is an arithmetic number, because the mean of its divisors is an integer number (50280528016).

Almost surely, 2^100561056031 is an apocalyptic number.

100561056031 is a deficient number, since it is larger than the sum of its proper divisors (1).

100561056031 is an equidigital number, since it uses as much as digits as its factorization.

100561056031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 100561056031 in words is "one hundred billion, five hundred sixty-one million, fifty-six thousand, thirty-one".