221421327546752 has 32 divisors (see below), whose sum is σ = 464329264186200. Its totient is φ = 104883786731520.

The previous prime is 221421327546709. The next prime is 221421327546791. The reversal of 221421327546752 is 257645723124122.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 221421327546694 and 221421327546703.

It is a congruent number.

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, 45522474449 + ... + 45522479312.

Almost surely, 2^{221421327546752} is an apocalyptic number.

It is an amenable number.

221421327546752 is an abundant number, since it is smaller than the sum of its proper divisors (242907936639448).

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

221421327546752 is an equidigital number, since it uses as much as digits as its factorization.

221421327546752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91044953794 (or 91044953782 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 53.

The spelling of 221421327546752 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, three hundred twenty-seven million, five hundred forty-six thousand, seven hundred fifty-two".