23101921 has 2 divisors, whose sum is σ = 23101922. Its totient is φ = 23101920.

The previous prime is 23101889. The next prime is 23101927. The reversal of 23101921 is 12910132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13242321 + 9859600 = 3639^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 23101921 - 2⁵ = 23101889 is a prime.

It is not a weakly prime, because it can be changed into another prime (23101927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11550960 + 11550961.

It is an arithmetic number, because the mean of its divisors is an integer number (11550961).

Almost surely, 2^23101921 is an apocalyptic number.

It is an amenable number.

23101921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23101921 is an equidigital number, since it uses as much as digits as its factorization.

23101921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 23101921 is about 4806.4457762467. The cubic root of 23101921 is about 284.8061511383.

The spelling of 23101921 in words is "twenty-three million, one hundred one thousand, nine hundred twenty-one".