221432332334420 has 48 divisors (see below), whose sum is σ = 477577824568320. Its totient is φ = 86178682698624.

The previous prime is 221432332334401. The next prime is 221432332334441. The reversal of 221432332334420 is 24433233234122.

It is a super-2 number, since 2×221432332334420² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207807437 + ... + 208870283.

It is an arithmetic number, because the mean of its divisors is an integer number (9949538011840).

Almost surely, 2^{221432332334420} is an apocalyptic number.

221432332334420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221432332334420 is an abundant number, since it is smaller than the sum of its proper divisors (256145492233900).

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

221432332334420 is a wasteful number, since it uses less digits than its factorization.

221432332334420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344432 (or 1344430 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 38.

Adding to 221432332334420 its reverse (24433233234122), we get a palindrome (245865565568542).

The spelling of 221432332334420 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, three hundred thirty-two million, three hundred thirty-four thousand, four hundred twenty".