221222202100100 has 36 divisors (see below), whose sum is σ = 480075166389504. Its totient is φ = 88484643451680.

The previous prime is 221222202100013. The next prime is 221222202100129. The reversal of 221222202100100 is 1001202222122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50868212 + ... + 55045611.

Almost surely, 2^{221222202100100} is an apocalyptic number.

221222202100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222202100100 is an abundant number, since it is smaller than the sum of its proper divisors (258852964289404).

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

221222202100100 is a wasteful number, since it uses less digits than its factorization.

221222202100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105934724 (or 105934717 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221222202100100 its reverse (1001202222122), we get a palindrome (222223404322222).

The spelling of 221222202100100 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred two million, one hundred thousand, one hundred".