22120111202100 has 144 divisors (see below), whose sum is σ = 65980542891648. Its totient is φ = 5717449013760.

The previous prime is 22120111202069. The next prime is 22120111202143. The reversal of 22120111202100 is 120211102122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22120111202100.

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, 869299 + ... + 6707898.

Almost surely, 2^{22120111202100} is an apocalyptic number.

22120111202100 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 22120111202100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32990271445824).

22120111202100 is an abundant number, since it is smaller than the sum of its proper divisors (43860431689548).

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

22120111202100 is a wasteful number, since it uses less digits than its factorization.

22120111202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7577514 (or 7577507 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22120111202100 its reverse (120211102122), we get a palindrome (22240322304222).

The spelling of 22120111202100 in words is "twenty-two trillion, one hundred twenty billion, one hundred eleven million, two hundred two thousand, one hundred".