100531376081 has 2 divisors, whose sum is σ = 100531376082. Its totient is φ = 100531376080.

The previous prime is 100531376051. The next prime is 100531376089. The reversal of 100531376081 is 180673135001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82897926400 + 17633449681 = 287920^2 + 132791^2 .

It is an emirp because it is prime and its reverse (180673135001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100531376081 is a prime.

It is a super-2 number, since 2×100531376081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100531376089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50265688040 + 50265688041.

It is an arithmetic number, because the mean of its divisors is an integer number (50265688041).

Almost surely, 2^100531376081 is an apocalyptic number.

It is an amenable number.

100531376081 is a deficient number, since it is larger than the sum of its proper divisors (1).

100531376081 is an equidigital number, since it uses as much as digits as its factorization.

100531376081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 100531376081 in words is "one hundred billion, five hundred thirty-one million, three hundred seventy-six thousand, eighty-one".