22122122221100 has 72 divisors (see below), whose sum is σ = 52371527674368. Its totient is φ = 8044034644800.

The previous prime is 22122122221081. The next prime is 22122122221109. The reversal of 22122122221100 is 112222122122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (22122122221109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23813537 + ... + 24725063.

Almost surely, 2^{22122122221100} is an apocalyptic number.

22122122221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22122122221100 is an abundant number, since it is smaller than the sum of its proper divisors (30249405453268).

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

22122122221100 is a wasteful number, since it uses less digits than its factorization.

22122122221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933615 (or 933608 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22122122221100 its reverse (112222122122), we get a palindrome (22234344343222).

The spelling of 22122122221100 in words is "twenty-two trillion, one hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred".