22101100 has 36 divisors (see below), whose sum is σ = 54812464. Its totient is φ = 7577280.

The previous prime is 22101083. The next prime is 22101113. The reversal of 22101100 is 110122.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15087 + ... + 16486.

Almost surely, 2^22101100 is an apocalyptic number.

22101100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22101100 is an abundant number, since it is smaller than the sum of its proper divisors (32711364).

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

22101100 is a wasteful number, since it uses less digits than its factorization.

22101100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31594 (or 31587 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 22101100 is about 4701.1807027597. The cubic root of 22101100 is about 280.6324987290.

Adding to 22101100 its reverse (110122), we get a palindrome (22211222).

It can be divided in two parts, 22101 and 100, that added together give a square (22201 = 149²).

The spelling of 22101100 in words is "twenty-two million, one hundred one thousand, one hundred".