2221222212100 has 72 divisors (see below), whose sum is σ = 4830718939200. Its totient is φ = 886524892800.

The previous prime is 2221222212089. The next prime is 2221222212133. The reversal of 2221222212100 is 12122221222.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85481110 + ... + 85507090.

It is an arithmetic number, because the mean of its divisors is an integer number (67093318600).

Almost surely, 2^{2221222212100} is an apocalyptic number.

2221222212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221222212100 is an abundant number, since it is smaller than the sum of its proper divisors (2609496727100).

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

2221222212100 is a wasteful number, since it uses less digits than its factorization.

2221222212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27853 (or 27846 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2221222212100 its reverse (12122221222), we get a palindrome (2233344433322).

The spelling of 2221222212100 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, one hundred".