31121124 has 24 divisors (see below), whose sum is σ = 72709728. Its totient is φ = 10360320.

The previous prime is 31121087. The next prime is 31121137. The reversal of 31121124 is 42112113.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13539 + ... + 15669.

It is an arithmetic number, because the mean of its divisors is an integer number (3029572).

Almost surely, 2^31121124 is an apocalyptic number.

It is an amenable number.

31121124 is an abundant number, since it is smaller than the sum of its proper divisors (41588604).

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

31121124 is a wasteful number, since it uses less digits than its factorization.

31121124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355 (or 3353 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 31121124 is about 5578.6310148638. The cubic root of 31121124 is about 314.5466696488.

Adding to 31121124 its reverse (42112113), we get a palindrome (73233237).

The spelling of 31121124 in words is "thirty-one million, one hundred twenty-one thousand, one hundred twenty-four".