2331131121212 has 48 divisors (see below), whose sum is σ = 4133318232960. Its totient is φ = 1150236172800.

The previous prime is 2331131121211. The next prime is 2331131121223. The reversal of 2331131121212 is 2121211311332.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2331131121211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 684216413 + ... + 684219819.

It is an arithmetic number, because the mean of its divisors is an integer number (86110796520).

Almost surely, 2^{2331131121212} is an apocalyptic number.

It is an amenable number.

2331131121212 is a deficient number, since it is larger than the sum of its proper divisors (1802187111748).

2331131121212 is a wasteful number, since it uses less digits than its factorization.

2331131121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6662 (or 6660 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

Adding to 2331131121212 its reverse (2121211311332), we get a palindrome (4452342432544).

The spelling of 2331131121212 in words is "two trillion, three hundred thirty-one billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred twelve".