2331121220131 has 4 divisors (see below), whose sum is σ = 2543041331064. Its totient is φ = 2119201109200.

The previous prime is 2331121220117. The next prime is 2331121220159. The reversal of 2331121220131 is 1310221211332.

2331121220131 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.

It is a cyclic number.

It is not a de Polignac number, because 2331121220131 - 2¹⁵ = 2331121187363 is a prime.

It is a super-2 number, since 2×2331121220131² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2331121220161) 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, 105960055450 + ... + 105960055471.

It is an arithmetic number, because the mean of its divisors is an integer number (635760332766).

Almost surely, 2^{2331121220131} is an apocalyptic number.

2331121220131 is a deficient number, since it is larger than the sum of its proper divisors (211920110933).

2331121220131 is a wasteful number, since it uses less digits than its factorization.

2331121220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211920110932.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2331121220131 its reverse (1310221211332), we get a palindrome (3641342431463).

The spelling of 2331121220131 in words is "two trillion, three hundred thirty-one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred thirty-one".