3121131011231 has 4 divisors (see below), whose sum is σ = 3121134837792. Its totient is φ = 3121127184672.

The previous prime is 3121131011227. The next prime is 3121131011233. The reversal of 3121131011231 is 1321101311213.

3121131011231 is digitally balanced in base 3, 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 brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3121131011231 - 2² = 3121131011227 is a prime.

It is a super-2 number, since 2×3121131011231² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121131011233) 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, 145130 + ... + 2502663.

It is an arithmetic number, because the mean of its divisors is an integer number (780283709448).

Almost surely, 2^{3121131011231} is an apocalyptic number.

3121131011231 is a deficient number, since it is larger than the sum of its proper divisors (3826561).

3121131011231 is a wasteful number, since it uses less digits than its factorization.

3121131011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826560.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 3121131011231 its reverse (1321101311213), we get a palindrome (4442232322444).

The spelling of 3121131011231 in words is "three trillion, one hundred twenty-one billion, one hundred thirty-one million, eleven thousand, two hundred thirty-one".