21214051202331 has 72 divisors (see below), whose sum is σ = 36876569315040. Its totient is φ = 11640193454592.

The previous prime is 21214051202291. The next prime is 21214051202387. The reversal of 21214051202331 is 13320215041212.

It is a happy number.

21214051202331 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 405 + 1 + 20 + 233 + 1 = 666.

It is not a de Polignac number, because 21214051202331 - 2¹¹ = 21214051200283 is a prime.

It is a super-2 number, since 2×21214051202331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21214051202295 and 21214051202304.

It is not an unprimeable number, because it can be changed into a prime (21214051202231) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 14054391 + ... + 15490448.

It is an arithmetic number, because the mean of its divisors is an integer number (512174573820).

Almost surely, 2^{21214051202331} is an apocalyptic number.

21214051202331 is a deficient number, since it is larger than the sum of its proper divisors (15662518112709).

21214051202331 is a wasteful number, since it uses less digits than its factorization.

21214051202331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29544913 (or 29544891 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 21214051202331 its reverse (13320215041212), we get a palindrome (34534266243543).

The spelling of 21214051202331 in words is "twenty-one trillion, two hundred fourteen billion, fifty-one million, two hundred two thousand, three hundred thirty-one".