222221212100100 has 108 divisors (see below), whose sum is σ = 696554862843840. Its totient is φ = 59257729137600.

The previous prime is 222221212100089. The next prime is 222221212100131. The reversal of 222221212100100 is 1001212122222.

It is a happy number.

222221212100100 is a `hidden beast` number, since 222 + 221 + 2 + 1 + 210 + 0 + 10 + 0 = 666.

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 35 ways as a sum of consecutive naturals, for example, 40085041 + ... + 45290759.

Almost surely, 2^{222221212100100} is an apocalyptic number.

222221212100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221212100100 is an abundant number, since it is smaller than the sum of its proper divisors (474333650743740).

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

222221212100100 is a wasteful number, since it uses less digits than its factorization.

222221212100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5253170 (or 5253160 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222221212100100 its reverse (1001212122222), we get a palindrome (223222424222322).

The spelling of 222221212100100 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred twelve million, one hundred thousand, one hundred".