21220311303232 has 28 divisors (see below), whose sum is σ = 43467411867136. Its totient is φ = 10267892565120.

The previous prime is 21220311303227. The next prime is 21220311303259. The reversal of 21220311303232 is 23230311302212.

It is a super-2 number, since 2×21220311303232² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21220311303197 and 21220311303206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5347858728 + ... + 5347862695.

Almost surely, 2^{21220311303232} is an apocalyptic number.

It is an amenable number.

21220311303232 is an abundant number, since it is smaller than the sum of its proper divisors (22247100563904).

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

21220311303232 is a wasteful number, since it uses less digits than its factorization.

21220311303232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10695721466 (or 10695721456 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21220311303232 its reverse (23230311302212), we get a palindrome (44450622605444).

The spelling of 21220311303232 in words is "twenty-one trillion, two hundred twenty billion, three hundred eleven million, three hundred three thousand, two hundred thirty-two".