2131121224 has 32 divisors (see below), whose sum is σ = 4235626080. Its totient is φ = 1001761024.

The previous prime is 2131121221. The next prime is 2131121249. The reversal of 2131121224 is 4221211312.

It is not an unprimeable number, because it can be changed into a prime (2131121221) 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, 120519 + ... + 137065.

It is an arithmetic number, because the mean of its divisors is an integer number (132363315).

Almost surely, 2^2131121224 is an apocalyptic number.

It is an amenable number.

2131121224 is a deficient number, since it is larger than the sum of its proper divisors (2104504856).

2131121224 is a wasteful number, since it uses less digits than its factorization.

2131121224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17517 (or 17513 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 2131121224 is about 46164.0685382040. The cubic root of 2131121224 is about 1286.8740739084.

Adding to 2131121224 its reverse (4221211312), we get a palindrome (6352332536).

The spelling of 2131121224 in words is "two billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred twenty-four".