221421207433632 has 24 divisors (see below), whose sum is σ = 581230669513536. Its totient is φ = 73807069144512.

The previous prime is 221421207433583. The next prime is 221421207433649. The reversal of 221421207433632 is 236334702124122.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×221421207433632² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153235455288 + ... + 1153235455479.

It is an arithmetic number, because the mean of its divisors is an integer number (24217944563064).

Almost surely, 2^{221421207433632} is an apocalyptic number.

It is an amenable number.

221421207433632 is an abundant number, since it is smaller than the sum of its proper divisors (359809462079904).

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

221421207433632 is a wasteful number, since it uses less digits than its factorization.

221421207433632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306470910780 (or 2306470910772 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 42.

Adding to 221421207433632 its reverse (236334702124122), we get a palindrome (457755909557754).

The spelling of 221421207433632 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred seven million, four hundred thirty-three thousand, six hundred thirty-two".