22220111222100 has 144 divisors (see below), whose sum is σ = 77927501279040. Its totient is φ = 5386693622400.

The previous prime is 22220111222083. The next prime is 22220111222161. The reversal of 22220111222100 is 122211102222.

It is a happy number.

22220111222100 is a `hidden beast` number, since 222 + 201 + 11 + 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 an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 374046247 + ... + 374105646.

Almost surely, 2^{22220111222100} is an apocalyptic number.

22220111222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220111222100 is an abundant number, since it is smaller than the sum of its proper divisors (55707390056940).

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

22220111222100 is a wasteful number, since it uses less digits than its factorization.

22220111222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748151927 (or 748151914 counting only the distinct ones).

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

Adding to 22220111222100 its reverse (122211102222), we get a palindrome (22342322324322).

The spelling of 22220111222100 in words is "twenty-two trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-two thousand, one hundred".