222222100202100 has 54 divisors (see below), whose sum is σ = 696542827414070. Its totient is φ = 59259226720320.

The previous prime is 222222100201987. The next prime is 222222100202191. The reversal of 222222100202100 is 1202001222222.

222222100202100 is a `hidden beast` number, since 2 + 2 + 222 + 210 + 0 + 20 + 210 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 48148222187664 + 174073878014436 = 6938892^2 + 13193706^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 123456721435 + ... + 123456723234.

Almost surely, 2^{222222100202100} is an apocalyptic number.

222222100202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222222100202100 is an abundant number, since it is smaller than the sum of its proper divisors (474320727211970).

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

222222100202100 is a wasteful number, since it uses less digits than its factorization.

222222100202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246913444689 (or 246913444679 counting only the distinct ones).

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

Adding to 222222100202100 its reverse (1202001222222), we get a palindrome (223424101424322).

The spelling of 222222100202100 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred million, two hundred two thousand, one hundred".