221101212100 has 36 divisors (see below), whose sum is σ = 505041720400. Its totient is φ = 83785721760.

The previous prime is 221101212047. The next prime is 221101212103. The reversal of 221101212100 is 1212101122.

It is not an unprimeable number, because it can be changed into a prime (221101212103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58182630 + ... + 58186429.

Almost surely, 2^221101212100 is an apocalyptic number.

221101212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221101212100 is an abundant number, since it is smaller than the sum of its proper divisors (283940508300).

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

221101212100 is a wasteful number, since it uses less digits than its factorization.

221101212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116369092 (or 116369085 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221101212100 its reverse (1212101122), we get a palindrome (222313313222).

The spelling of 221101212100 in words is "two hundred twenty-one billion, one hundred one million, two hundred twelve thousand, one hundred".