100751921 has 2 divisors, whose sum is σ = 100751922. Its totient is φ = 100751920.

The previous prime is 100751897. The next prime is 100751923. The reversal of 100751921 is 129157001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100721296 + 30625 = 10036^2 + 175^2 .

It is a cyclic number.

It is not a de Polignac number, because 100751921 - 2⁶ = 100751857 is a prime.

It is a Sophie Germain prime.

Together with 100751923, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (100751923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50375960 + 50375961.

It is an arithmetic number, because the mean of its divisors is an integer number (50375961).

Almost surely, 2^100751921 is an apocalyptic number.

It is an amenable number.

100751921 is a deficient number, since it is larger than the sum of its proper divisors (1).

100751921 is an equidigital number, since it uses as much as digits as its factorization.

100751921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 100751921 is about 10037.5256413122. The cubic root of 100751921 is about 465.3193489807.

The spelling of 100751921 in words is "one hundred million, seven hundred fifty-one thousand, nine hundred twenty-one".