221421251427732 has 48 divisors (see below), whose sum is σ = 574067811811200. Its totient is φ = 73805448957120.

The previous prime is 221421251427731. The next prime is 221421251427781. The reversal of 221421251427732 is 237724152124122.

221421251427732 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 212 + 5 + 1 + 427 + 7 + 3 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221421251427731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17803057 + ... + 27564312.

It is an arithmetic number, because the mean of its divisors is an integer number (11959746079400).

Almost surely, 2^{221421251427732} is an apocalyptic number.

It is an amenable number.

221421251427732 is an abundant number, since it is smaller than the sum of its proper divisors (352646560383468).

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

221421251427732 is a wasteful number, since it uses less digits than its factorization.

221421251427732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45412573 (or 45412565 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The spelling of 221421251427732 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-one million, four hundred twenty-seven thousand, seven hundred thirty-two".