21214036536051 has 32 divisors (see below), whose sum is σ = 28849273528320. Its totient is φ = 13862195912864.

The previous prime is 21214036535959. The next prime is 21214036536061. The reversal of 21214036536051 is 15063563041212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21214036536051 - 2¹¹ = 21214036534003 is a prime.

It is a super-2 number, since 2×21214036536051² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21214036536061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116506186 + ... + 116688128.

It is an arithmetic number, because the mean of its divisors is an integer number (901539797760).

Almost surely, 2^{21214036536051} is an apocalyptic number.

21214036536051 is a deficient number, since it is larger than the sum of its proper divisors (7635236992269).

21214036536051 is a wasteful number, since it uses less digits than its factorization.

21214036536051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183935.

The product of its (nonzero) digits is 129600, while the sum is 39.

Adding to 21214036536051 its reverse (15063563041212), we get a palindrome (36277599577263).

The spelling of 21214036536051 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, fifty-one".