21214036533252 has 24 divisors (see below), whose sum is σ = 52411149082656. Its totient is φ = 6655384010368.

The previous prime is 21214036533203. The next prime is 21214036533253. The reversal of 21214036533252 is 25233563041212.

It is a self number, because there is not a number n which added to its sum of digits gives 21214036533252.

It is not an unprimeable number, because it can be changed into a prime (21214036533253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51995187378 + ... + 51995187785.

It is an arithmetic number, because the mean of its divisors is an integer number (2183797878444).

Almost surely, 2^{21214036533252} is an apocalyptic number.

It is an amenable number.

21214036533252 is an abundant number, since it is smaller than the sum of its proper divisors (31197112549404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21214036533252 is a wasteful number, since it uses less digits than its factorization.

21214036533252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103990375187 (or 103990375185 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 21214036533252 its reverse (25233563041212), we get a palindrome (46447599574464).

The spelling of 21214036533252 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-three thousand, two hundred fifty-two".