221332222020 has 96 divisors (see below), whose sum is σ = 762744907008. Its totient is φ = 46698665472.

The previous prime is 221332221989. The next prime is 221332222043. The reversal of 221332222020 is 20222233122.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20263059 + ... + 20273978.

It is an arithmetic number, because the mean of its divisors is an integer number (7945259448).

Almost surely, 2^221332222020 is an apocalyptic number.

221332222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221332222020 is an abundant number, since it is smaller than the sum of its proper divisors (541412684988).

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

221332222020 is a wasteful number, since it uses less digits than its factorization.

221332222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40537069 (or 40537067 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 221332222020 its reverse (20222233122), we get a palindrome (241554455142).

The spelling of 221332222020 in words is "two hundred twenty-one billion, three hundred thirty-two million, two hundred twenty-two thousand, twenty".