221321243024432 has 80 divisors (see below), whose sum is σ = 470691786868992. Its totient is φ = 100358875668480.

The previous prime is 221321243024407. The next prime is 221321243024461. The reversal of 221321243024432 is 234420342123122.

It is a super-2 number, since 2×221321243024432² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221321243024392 and 221321243024401.

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, 54361043 + ... + 58290354.

Almost surely, 2^{221321243024432} is an apocalyptic number.

It is an amenable number.

221321243024432 is an abundant number, since it is smaller than the sum of its proper divisors (249370543844560).

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

221321243024432 is a wasteful number, since it uses less digits than its factorization.

221321243024432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112651686 (or 112651680 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 221321243024432 its reverse (234420342123122), we get a palindrome (455741585147554).

The spelling of 221321243024432 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, two hundred forty-three million, twenty-four thousand, four hundred thirty-two".