222100221020 has 12 divisors (see below), whose sum is σ = 466410464184. Its totient is φ = 88840088400.

The previous prime is 222100220987. The next prime is 222100221047. The reversal of 222100221020 is 20122001222.

It is a junction number, because it is equal to n+sod(n) for n = 222100220986 and 222100221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5552505506 + ... + 5552505545.

It is an arithmetic number, because the mean of its divisors is an integer number (38867538682).

Almost surely, 2^222100221020 is an apocalyptic number.

222100221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222100221020 is an abundant number, since it is smaller than the sum of its proper divisors (244310243164).

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

222100221020 is a wasteful number, since it uses less digits than its factorization.

222100221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11105011060 (or 11105011058 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 222100221020 its reverse (20122001222), we get a palindrome (242222222242).

The spelling of 222100221020 in words is "two hundred twenty-two billion, one hundred million, two hundred twenty-one thousand, twenty".