2131124500 has 24 divisors (see below), whose sum is σ = 4654377000. Its totient is φ = 852449600.

The previous prime is 2131124497. The next prime is 2131124503. The reversal of 2131124500 is 54211312.

It is an interprime number because it is at equal distance from previous prime (2131124497) and next prime (2131124503).

It can be written as a sum of positive squares in 4 ways, for example, as 9604 + 2131114896 = 98^2 + 46164^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131124503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2130625 + ... + 2131624.

It is an arithmetic number, because the mean of its divisors is an integer number (193932375).

Almost surely, 2^2131124500 is an apocalyptic number.

2131124500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131124500 is an abundant number, since it is smaller than the sum of its proper divisors (2523252500).

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

2131124500 is a wasteful number, since it uses less digits than its factorization.

2131124500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262268 (or 4262256 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2131124500 is about 46164.1040203316. The cubic root of 2131124500 is about 1286.8747333105.

Adding to 2131124500 its reverse (54211312), we get a palindrome (2185335812).

The spelling of 2131124500 in words is "two billion, one hundred thirty-one million, one hundred twenty-four thousand, five hundred".