21520002223332 has 72 divisors (see below), whose sum is σ = 54720191766240. Its totient is φ = 7130845810560.

The previous prime is 21520002223303. The next prime is 21520002223333. The reversal of 21520002223332 is 23332220002512.

It is a super-2 number, since 2×21520002223332² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21520002223296 and 21520002223305.

It is not an unprimeable number, because it can be changed into a prime (21520002223333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18530032 + ... + 19657112.

It is an arithmetic number, because the mean of its divisors is an integer number (760002663420).

Almost surely, 2^{21520002223332} is an apocalyptic number.

It is an amenable number.

21520002223332 is an abundant number, since it is smaller than the sum of its proper divisors (33200189542908).

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

21520002223332 is a wasteful number, since it uses less digits than its factorization.

21520002223332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130233 (or 1130228 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 21520002223332 its reverse (23332220002512), we get a palindrome (44852222225844).

The spelling of 21520002223332 in words is "twenty-one trillion, five hundred twenty billion, two million, two hundred twenty-three thousand, three hundred thirty-two".