2100423131 has 4 divisors (see below), whose sum is σ = 2100548064. Its totient is φ = 2100298200.

The previous prime is 2100423119. The next prime is 2100423139. The reversal of 2100423131 is 1313240012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2100423131 - 2²⁶ = 2033314267 is a prime.

It is a super-2 number, since 2×2100423131² = 8823554658479686322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100423139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32435 + ... + 72476.

It is an arithmetic number, because the mean of its divisors is an integer number (525137016).

Almost surely, 2^2100423131 is an apocalyptic number.

2100423131 is a deficient number, since it is larger than the sum of its proper divisors (124933).

2100423131 is a wasteful number, since it uses less digits than its factorization.

2100423131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124932.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2100423131 is about 45830.3734547298. The cubic root of 2100423131 is about 1280.6651675834.

Adding to 2100423131 its reverse (1313240012), we get a palindrome (3413663143).

The spelling of 2100423131 in words is "two billion, one hundred million, four hundred twenty-three thousand, one hundred thirty-one".