222212222100 has 288 divisors, whose sum is σ = 780346721280. Its totient is φ = 53798256000.

The previous prime is 222212222087. The next prime is 222212222101. The reversal of 222212222100 is 1222212222.

222212222100 is a `hidden beast` number, since 222 + 212 + 22 + 210 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222212222101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24438555 + ... + 24447645.

Almost surely, 2^222212222100 is an apocalyptic number.

222212222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222212222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390173360640).

222212222100 is an abundant number, since it is smaller than the sum of its proper divisors (558134499180).

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

222212222100 is a wasteful number, since it uses less digits than its factorization.

222212222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9948 (or 9935 counting only the distinct ones).

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

Adding to 222212222100 its reverse (1222212222), we get a palindrome (223434434322).

It can be divided in two parts, 22221 and 2222100, that multiplied together give a square (49377284100 = 222210²).

The spelling of 222212222100 in words is "two hundred twenty-two billion, two hundred twelve million, two hundred twenty-two thousand, one hundred".