3131331121 has 8 divisors (see below), whose sum is σ = 3160913184. Its totient is φ = 3101835360.

The previous prime is 3131331103. The next prime is 3131331191. The reversal of 3131331121 is 1211331313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131331121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131331101) 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, 52525 + ... + 94981.

It is an arithmetic number, because the mean of its divisors is an integer number (395114148).

Almost surely, 2^3131331121 is an apocalyptic number.

It is an amenable number.

3131331121 is a deficient number, since it is larger than the sum of its proper divisors (29582063).

3131331121 is a wasteful number, since it uses less digits than its factorization.

3131331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43151.

The product of its digits is 162, while the sum is 19.

The square root of 3131331121 is about 55958.2980531038. The cubic root of 3131331121 is about 1462.9955263029.

Adding to 3131331121 its reverse (1211331313), we get a palindrome (4342662434).

The spelling of 3131331121 in words is "three billion, one hundred thirty-one million, three hundred thirty-one thousand, one hundred twenty-one".