22222212011100 has 144 divisors (see below), whose sum is σ = 72147626943840. Its totient is φ = 5867250624000.

The previous prime is 22222212011057. The next prime is 22222212011117. The reversal of 22222212011100 is 111021222222.

It is a happy number.

22222212011100 is a `hidden beast` number, since 222 + 222 + 120 + 1 + 1 + 100 = 666.

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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40472097 + ... + 41017496.

It is an arithmetic number, because the mean of its divisors is an integer number (501025187110).

Almost surely, 2^{22222212011100} is an apocalyptic number.

22222212011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222212011100 is an abundant number, since it is smaller than the sum of its proper divisors (49925414932740).

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

22222212011100 is a wasteful number, since it uses less digits than its factorization.

22222212011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81489717 (or 81489704 counting only the distinct ones).

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

Adding to 22222212011100 its reverse (111021222222), we get a palindrome (22333233233322).

The spelling of 22222212011100 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twelve million, eleven thousand, one hundred".