2121320332231 has 16 divisors (see below), whose sum is σ = 2132316074880. Its totient is φ = 2110359513600.

The previous prime is 2121320332213. The next prime is 2121320332267. The reversal of 2121320332231 is 1322330231212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121320332231 is a prime.

It is a super-2 number, since 2×2121320332231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121320332196 and 2121320332205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121320330231) 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, 298395705 + ... + 298402813.

It is an arithmetic number, because the mean of its divisors is an integer number (133269754680).

Almost surely, 2^{2121320332231} is an apocalyptic number.

2121320332231 is a deficient number, since it is larger than the sum of its proper divisors (10995742649).

2121320332231 is a wasteful number, since it uses less digits than its factorization.

2121320332231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9354.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 2121320332231 its reverse (1322330231212), we get a palindrome (3443650563443).

The spelling of 2121320332231 in words is "two trillion, one hundred twenty-one billion, three hundred twenty million, three hundred thirty-two thousand, two hundred thirty-one".