2121324320231 has 16 divisors (see below), whose sum is σ = 2248594223616. Its totient is φ = 1994331373056.

The previous prime is 2121324320221. The next prime is 2121324320267. The reversal of 2121324320231 is 1320234231212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121324320231 is a prime.

It is a super-2 number, since 2×2121324320231² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121324320231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121324320201) 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, 193599005 + ... + 193609961.

It is an arithmetic number, because the mean of its divisors is an integer number (140537138976).

Almost surely, 2^{2121324320231} is an apocalyptic number.

2121324320231 is a deficient number, since it is larger than the sum of its proper divisors (127269903385).

2121324320231 is a wasteful number, since it uses less digits than its factorization.

2121324320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22538.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 2121324320231 its reverse (1320234231212), we get a palindrome (3441558551443).

The spelling of 2121324320231 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-four million, three hundred twenty thousand, two hundred thirty-one".