222221200220100 has 54 divisors (see below), whose sum is σ = 696540006470490. Its totient is φ = 59258986725120.

The previous prime is 222221200220011. The next prime is 222221200220161. The reversal of 222221200220100 is 1022002122222.

222221200220100 is a `hidden beast` number, since 2 + 2 + 222 + 120 + 0 + 220 + 100 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 273656626884 + 221947543593216 = 523122^2 + 14897904^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 123456221445 + ... + 123456223244.

Almost surely, 2^{222221200220100} is an apocalyptic number.

222221200220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221200220100 is an abundant number, since it is smaller than the sum of its proper divisors (474318806250390).

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

222221200220100 is a wasteful number, since it uses less digits than its factorization.

222221200220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246912444709 (or 246912444699 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222221200220100 its reverse (1022002122222), we get a palindrome (223243202342322).

The spelling of 222221200220100 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred million, two hundred twenty thousand, one hundred".