221021220232 has 32 divisors (see below), whose sum is σ = 415595980800. Its totient is φ = 110195766144.

The previous prime is 221021220227. The next prime is 221021220247. The reversal of 221021220232 is 232022120122.

221021220232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221021220232² (a number of 23 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 7 ways as a sum of consecutive naturals, for example, 22077244 + ... + 22087252.

It is an arithmetic number, because the mean of its divisors is an integer number (12987374400).

Almost surely, 2^221021220232 is an apocalyptic number.

It is an amenable number.

221021220232 is a deficient number, since it is larger than the sum of its proper divisors (194574760568).

221021220232 is a wasteful number, since it uses less digits than its factorization.

221021220232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17605 (or 17601 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 221021220232 its reverse (232022120122), we get a palindrome (453043340354).

The spelling of 221021220232 in words is "two hundred twenty-one billion, twenty-one million, two hundred twenty thousand, two hundred thirty-two".