31124121 has 8 divisors (see below), whose sum is σ = 47427264. Its totient is φ = 17785200.

The previous prime is 31124089. The next prime is 31124123. The reversal of 31124121 is 12142113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31124121 - 2⁵ = 31124089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31124121.

It is not an unprimeable number, because it can be changed into a prime (31124123) 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, 741030 + ... + 741071.

It is an arithmetic number, because the mean of its divisors is an integer number (5928408).

Almost surely, 2^31124121 is an apocalyptic number.

It is an amenable number.

31124121 is a deficient number, since it is larger than the sum of its proper divisors (16303143).

31124121 is a wasteful number, since it uses less digits than its factorization.

31124121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482111.

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

The square root of 31124121 is about 5578.8996226855. The cubic root of 31124121 is about 314.5567663933.

Adding to 31124121 its reverse (12142113), we get a palindrome (43266234).

The spelling of 31124121 in words is "thirty-one million, one hundred twenty-four thousand, one hundred twenty-one".