2131230100 has 36 divisors (see below), whose sum is σ = 4627397404. Its totient is φ = 852007680.

The previous prime is 2131230089. The next prime is 2131230103. The reversal of 2131230100 is 10321312.

It can be written as a sum of positive squares in 6 ways, for example, as 764301316 + 1366928784 = 27646^2 + 36972^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131230103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208714 + ... + 218686.

Almost surely, 2^2131230100 is an apocalyptic number.

2131230100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131230100 is an abundant number, since it is smaller than the sum of its proper divisors (2496167304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131230100 is a wasteful number, since it uses less digits than its factorization.

2131230100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12124 (or 12117 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2131230100 is about 46165.2477519616. The cubic root of 2131230100 is about 1286.8959884002.

Adding to 2131230100 its reverse (10321312), we get a palindrome (2141551412).

The spelling of 2131230100 in words is "two billion, one hundred thirty-one million, two hundred thirty thousand, one hundred".