221101122100 has 36 divisors (see below), whose sum is σ = 479928733984. Its totient is φ = 88414771680.

The previous prime is 221101122083. The next prime is 221101122101. The reversal of 221101122100 is 1221101122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101122101) 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, 27067 + ... + 665533.

Almost surely, 2^221101122100 is an apocalyptic number.

221101122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221101122100 is an abundant number, since it is smaller than the sum of its proper divisors (258827611884).

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

221101122100 is a wasteful number, since it uses less digits than its factorization.

221101122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641944 (or 641937 counting only the distinct ones).

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

Adding to 221101122100 its reverse (1221101122), we get a palindrome (222322223222).

The spelling of 221101122100 in words is "two hundred twenty-one billion, one hundred one million, one hundred twenty-two thousand, one hundred".