100317556321 has 2 divisors, whose sum is σ = 100317556322. Its totient is φ = 100317556320.

The previous prime is 100317556319. The next prime is 100317556327. The reversal of 100317556321 is 123655713001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96261267600 + 4056288721 = 310260^2 + 63689^2 .

It is a cyclic number.

It is not a de Polignac number, because 100317556321 - 2¹ = 100317556319 is a prime.

It is a super-2 number, since 2×100317556321² (a number of 23 digits) contains 22 as substring.

Together with 100317556319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (100317556327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50158778160 + 50158778161.

It is an arithmetic number, because the mean of its divisors is an integer number (50158778161).

Almost surely, 2^100317556321 is an apocalyptic number.

It is an amenable number.

100317556321 is a deficient number, since it is larger than the sum of its proper divisors (1).

100317556321 is an equidigital number, since it uses as much as digits as its factorization.

100317556321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The spelling of 100317556321 in words is "one hundred billion, three hundred seventeen million, five hundred fifty-six thousand, three hundred twenty-one".