22222100222100 has 216 divisors, whose sum is σ = 71654395158528. Its totient is φ = 5756230137600.

The previous prime is 22222100222053. The next prime is 22222100222107. The reversal of 22222100222100 is 122200122222.

22222100222100 is a `hidden beast` number, since 2 + 222 + 210 + 0 + 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 (22222100222107) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19663405 + ... + 20762795.

Almost surely, 2^{22222100222100} is an apocalyptic number.

22222100222100 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 22222100222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35827197579264).

22222100222100 is an abundant number, since it is smaller than the sum of its proper divisors (49432294936428).

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

22222100222100 is a wasteful number, since it uses less digits than its factorization.

22222100222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100055 (or 1100045 counting only the distinct ones).

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

Adding to 22222100222100 its reverse (122200122222), we get a palindrome (22344300344322).

The spelling of 22222100222100 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred million, two hundred twenty-two thousand, one hundred".