221112020020 has 24 divisors (see below), whose sum is σ = 468444408264. Its totient is φ = 87662109696.

The previous prime is 221112020011. The next prime is 221112020111. The reversal of 221112020020 is 20020211122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14490862884 + 206621157136 = 120378^2 + 454556^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48916329 + ... + 48920848.

It is an arithmetic number, because the mean of its divisors is an integer number (19518517011).

Almost surely, 2^221112020020 is an apocalyptic number.

221112020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112020020 is an abundant number, since it is smaller than the sum of its proper divisors (247332388244).

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

221112020020 is a wasteful number, since it uses less digits than its factorization.

221112020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97837299 (or 97837297 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221112020020 its reverse (20020211122), we get a palindrome (241132231142).

The spelling of 221112020020 in words is "two hundred twenty-one billion, one hundred twelve million, twenty thousand, twenty".