31160121 has 4 divisors (see below), whose sum is σ = 41546832. Its totient is φ = 20773412.

The previous prime is 31160119. The next prime is 31160137. The reversal of 31160121 is 12106113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31160121 - 2¹ = 31160119 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31160121.

It is not an unprimeable number, because it can be changed into a prime (31160111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5193351 + ... + 5193356.

It is an arithmetic number, because the mean of its divisors is an integer number (10386708).

Almost surely, 2^31160121 is an apocalyptic number.

It is an amenable number.

31160121 is a deficient number, since it is larger than the sum of its proper divisors (10386711).

31160121 is a wasteful number, since it uses less digits than its factorization.

31160121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10386710.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 31160121 is about 5582.1251329579. The cubic root of 31160121 is about 314.6779979870.

Adding to 31160121 its reverse (12106113), we get a palindrome (43266234).

The spelling of 31160121 in words is "thirty-one million, one hundred sixty thousand, one hundred twenty-one".