21402332413231 has 16 divisors (see below), whose sum is σ = 26683537333248. Its totient is φ = 16677073447200.

The previous prime is 21402332413157. The next prime is 21402332413237. The reversal of 21402332413231 is 13231423320412.

It is a cyclic number.

It is not a de Polignac number, because 21402332413231 - 2⁴¹ = 19203309157679 is a prime.

It is a super-2 number, since 2×21402332413231² (a number of 27 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 = 21402332413193 and 21402332413202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402332413237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26507841 + ... + 27303301.

It is an arithmetic number, because the mean of its divisors is an integer number (1667721083328).

Almost surely, 2^{21402332413231} is an apocalyptic number.

21402332413231 is a deficient number, since it is larger than the sum of its proper divisors (5281204920017).

21402332413231 is a wasteful number, since it uses less digits than its factorization.

21402332413231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144902.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 21402332413231 its reverse (13231423320412), we get a palindrome (34633755733643).

The spelling of 21402332413231 in words is "twenty-one trillion, four hundred two billion, three hundred thirty-two million, four hundred thirteen thousand, two hundred thirty-one".