22123100100 has 108 divisors (see below), whose sum is σ = 65534357616. Its totient is φ = 5762151360.

The previous prime is 22123100081. The next prime is 22123100107. The reversal of 22123100100 is 100132122.

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

It is not an unprimeable number, because it can be changed into a prime (22123100107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 534759 + ... + 574641.

Almost surely, 2^22123100100 is an apocalyptic number.

22123100100 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 22123100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32767178808).

22123100100 is an abundant number, since it is smaller than the sum of its proper divisors (43411257516).

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

22123100100 is a wasteful number, since it uses less digits than its factorization.

22123100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39986 (or 39936 counting only the distinct ones).

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

Adding to 22123100100 its reverse (100132122), we get a palindrome (22223232222).

The spelling of 22123100100 in words is "twenty-two billion, one hundred twenty-three million, one hundred thousand, one hundred".