221112100100 has 36 divisors (see below), whose sum is σ = 480815059200. Its totient is φ = 88260176160.

The previous prime is 221112100051. The next prime is 221112100103. The reversal of 221112100100 is 1001211122.

It is not an unprimeable number, because it can be changed into a prime (221112100103) 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, 2260160 + ... + 2355959.

Almost surely, 2^221112100100 is an apocalyptic number.

221112100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112100100 is an abundant number, since it is smaller than the sum of its proper divisors (259702959100).

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

221112100100 is a wasteful number, since it uses less digits than its factorization.

221112100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616612 (or 4616605 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221112100100 its reverse (1001211122), we get a palindrome (222113311222).

The spelling of 221112100100 in words is "two hundred twenty-one billion, one hundred twelve million, one hundred thousand, one hundred".