22061100 has 72 divisors (see below), whose sum is σ = 64384768. Its totient is φ = 5832000.

The previous prime is 22061069. The next prime is 22061113. The reversal of 22061100 is 116022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45057 + ... + 45543.

Almost surely, 2^22061100 is an apocalyptic number.

22061100 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 22061100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32192384).

22061100 is an abundant number, since it is smaller than the sum of its proper divisors (42323668).

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

22061100 is a wasteful number, since it uses less digits than its factorization.

22061100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 22061100 is about 4696.9245256870. The cubic root of 22061100 is about 280.4630942068.

Adding to 22061100 its reverse (116022), we get a palindrome (22177122).

The spelling of 22061100 in words is "twenty-two million, sixty-one thousand, one hundred".