31106121 has 8 divisors (see below), whose sum is σ = 41595744. Its totient is φ = 20676960.

The previous prime is 31106099. The next prime is 31106129. The reversal of 31106121 is 12160113.

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

It is not a de Polignac number, because 31106121 - 2¹⁰ = 31105097 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 31106121.

It is not an unprimeable number, because it can be changed into a prime (31106129) 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, 13900 + ... + 15981.

It is an arithmetic number, because the mean of its divisors is an integer number (5199468).

Almost surely, 2^31106121 is an apocalyptic number.

It is an amenable number.

31106121 is a deficient number, since it is larger than the sum of its proper divisors (10489623).

31106121 is a wasteful number, since it uses less digits than its factorization.

31106121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30231.

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

The square root of 31106121 is about 5577.2861680211. The cubic root of 31106121 is about 314.4961155383.

Adding to 31106121 its reverse (12160113), we get a palindrome (43266234).

The spelling of 31106121 in words is "thirty-one million, one hundred six thousand, one hundred twenty-one".