2100131923 has 2 divisors, whose sum is σ = 2100131924. Its totient is φ = 2100131922.

The previous prime is 2100131903. The next prime is 2100131939. The reversal of 2100131923 is 3291310012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100131923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100131894 and 2100131903.

It is not a weakly prime, because it can be changed into another prime (2100131903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050065961 + 1050065962.

It is an arithmetic number, because the mean of its divisors is an integer number (1050065962).

Almost surely, 2^2100131923 is an apocalyptic number.

2100131923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100131923 is an equidigital number, since it uses as much as digits as its factorization.

2100131923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 2100131923 is about 45827.1963248899. The cubic root of 2100131923 is about 1280.6059799570.

Adding to 2100131923 its reverse (3291310012), we get a palindrome (5391441935).

The spelling of 2100131923 in words is "two billion, one hundred million, one hundred thirty-one thousand, nine hundred twenty-three".