3231312121 has 4 divisors (see below), whose sum is σ = 3401381200. Its totient is φ = 3061243044.

The previous prime is 3231312107. The next prime is 3231312137. The reversal of 3231312121 is 1212131323.

3231312121 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1212131323 = 13 ⋅93240871.

It is a cyclic number.

It is not a de Polignac number, because 3231312121 - 2²¹ = 3229214969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 170069059 = 3231312121 / (3 + 2 + 3 + 1 + 3 + 1 + 2 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3231312101) 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, 85034511 + ... + 85034548.

It is an arithmetic number, because the mean of its divisors is an integer number (850345300).

Almost surely, 2^3231312121 is an apocalyptic number.

It is an amenable number.

3231312121 is a deficient number, since it is larger than the sum of its proper divisors (170069079).

3231312121 is a wasteful number, since it uses less digits than its factorization.

3231312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170069078.

The product of its digits is 216, while the sum is 19.

The square root of 3231312121 is about 56844.6314175754. The cubic root of 3231312121 is about 1478.4034586921.

Adding to 3231312121 its reverse (1212131323), we get a palindrome (4443443444).

The spelling of 3231312121 in words is "three billion, two hundred thirty-one million, three hundred twelve thousand, one hundred twenty-one".