100812957881 has 8 divisors (see below), whose sum is σ = 106747413480. Its totient is φ = 94878978048.

The previous prime is 100812957877. The next prime is 100812957923. The reversal of 100812957881 is 188759218001.

It can be written as a sum of positive squares in 4 ways, for example, as 285914281 + 100527043600 = 16909^2 + 317060^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100812957881 - 2² = 100812957877 is a prime.

It is a super-2 number, since 2×100812957881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100812957811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376265 + ... + 585833.

It is an arithmetic number, because the mean of its divisors is an integer number (13343426685).

Almost surely, 2^100812957881 is an apocalyptic number.

It is an amenable number.

100812957881 is a deficient number, since it is larger than the sum of its proper divisors (5934455599).

100812957881 is a wasteful number, since it uses less digits than its factorization.

100812957881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237883.

The product of its (nonzero) digits is 322560, while the sum is 50.

The spelling of 100812957881 in words is "one hundred billion, eight hundred twelve million, nine hundred fifty-seven thousand, eight hundred eighty-one".