2122221100 has 18 divisors (see below), whose sum is σ = 4605220004. Its totient is φ = 848888400.

The previous prime is 2122221083. The next prime is 2122221133. The reversal of 2122221100 is 11222212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10611006 + ... + 10611205.

Almost surely, 2^2122221100 is an apocalyptic number.

2122221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122221100 is an abundant number, since it is smaller than the sum of its proper divisors (2482998904).

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

2122221100 is a wasteful number, since it uses less digits than its factorization.

2122221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21222225 (or 21222218 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2122221100 is about 46067.5710234434. The cubic root of 2122221100 is about 1285.0801324765.

Adding to 2122221100 its reverse (11222212), we get a palindrome (2133443312).

The spelling of 2122221100 in words is "two billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred".