221021220332 has 24 divisors (see below), whose sum is σ = 430927257600. Its totient is φ = 98326654160.

The previous prime is 221021220317. The next prime is 221021220337. The reversal of 221021220332 is 233022120122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221021220337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53436332 + ... + 53440467.

It is an arithmetic number, because the mean of its divisors is an integer number (17955302400).

Almost surely, 2^221021220332 is an apocalyptic number.

221021220332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221021220332 is a deficient number, since it is larger than the sum of its proper divisors (209906037268).

221021220332 is a wasteful number, since it uses less digits than its factorization.

221021220332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106876861 (or 106876859 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221021220332 its reverse (233022120122), we get a palindrome (454043340454).

The spelling of 221021220332 in words is "two hundred twenty-one billion, twenty-one million, two hundred twenty thousand, three hundred thirty-two".