22222122100 has 18 divisors (see below), whose sum is σ = 48222005174. Its totient is φ = 8888848800.

The previous prime is 22222122079. The next prime is 22222122107. The reversal of 22222122100 is 122122222.

It can be written as a sum of positive squares in 3 ways, for example, as 804970384 + 21417151716 = 28372^2 + 146346^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222122107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111110511 + ... + 111110710.

Almost surely, 2^22222122100 is an apocalyptic number.

22222122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222122100 is an abundant number, since it is smaller than the sum of its proper divisors (25999883074).

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

22222122100 is a wasteful number, since it uses less digits than its factorization.

22222122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222221235 (or 222221228 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22222122100 its reverse (122122222), we get a palindrome (22344244322).

It can be divided in two parts, 22222122 and 100, that added together give a palindrome (22222222).

The spelling of 22222122100 in words is "twenty-two billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred".