222120100020 has 192 divisors, whose sum is σ = 805747783680. Its totient is φ = 44398305792.

The previous prime is 222120099983. The next prime is 222120100021. The reversal of 222120100020 is 20001021222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 222120099969 and 222120100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222120100021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 966822 + ... + 1174301.

It is an arithmetic number, because the mean of its divisors is an integer number (4196603040).

Almost surely, 2^222120100020 is an apocalyptic number.

222120100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222120100020 is an abundant number, since it is smaller than the sum of its proper divisors (583627683660).

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

222120100020 is a wasteful number, since it uses less digits than its factorization.

222120100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141174 (or 2141172 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 222120100020 its reverse (20001021222), we get a palindrome (242121121242).

The spelling of 222120100020 in words is "two hundred twenty-two billion, one hundred twenty million, one hundred thousand, twenty".