2331231120021 has 16 divisors (see below), whose sum is σ = 3154985335040. Its totient is φ = 1530870865920.

The previous prime is 2331231119981. The next prime is 2331231120089. The reversal of 2331231120021 is 1200211321332.

2331231120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2331231120021 - 2¹¹ = 2331231117973 is a prime.

It is a super-2 number, since 2×2331231120021² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2331231120021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2331231120221) 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, 6752845 + ... + 7089666.

It is an arithmetic number, because the mean of its divisors is an integer number (197186583440).

Almost surely, 2^{2331231120021} is an apocalyptic number.

It is an amenable number.

2331231120021 is a deficient number, since it is larger than the sum of its proper divisors (823754215019).

2331231120021 is a wasteful number, since it uses less digits than its factorization.

2331231120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13843356.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 2331231120021 its reverse (1200211321332), we get a palindrome (3531442441353).

The spelling of 2331231120021 in words is "two trillion, three hundred thirty-one billion, two hundred thirty-one million, one hundred twenty thousand, twenty-one".