3131101121 has 4 divisors (see below), whose sum is σ = 3163380612. Its totient is φ = 3098821632.

The previous prime is 3131101109. The next prime is 3131101163. The reversal of 3131101121 is 1211011313.

It is a happy number.

3131101121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1211011313 = 1487 ⋅814399.

It can be written as a sum of positive squares in 2 ways, for example, as 1489960000 + 1641141121 = 38600^2 + 40511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131101121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131101096 and 3131101105.

It is not an unprimeable number, because it can be changed into a prime (3131101921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16139600 + ... + 16139793.

It is an arithmetic number, because the mean of its divisors is an integer number (790845153).

Almost surely, 2^3131101121 is an apocalyptic number.

It is an amenable number.

3131101121 is a deficient number, since it is larger than the sum of its proper divisors (32279491).

3131101121 is an equidigital number, since it uses as much as digits as its factorization.

3131101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32279490.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 3131101121 is about 55956.2429135481. The cubic root of 3131101121 is about 1462.9597058379.

Adding to 3131101121 its reverse (1211011313), we get a palindrome (4342112434).

The spelling of 3131101121 in words is "three billion, one hundred thirty-one million, one hundred one thousand, one hundred twenty-one".