221021011112 has 32 divisors (see below), whose sum is σ = 452139576480. Its totient is φ = 100452730560.

The previous prime is 221021011111. The next prime is 221021011157. The reversal of 221021011112 is 211110120122.

It is not an unprimeable number, because it can be changed into a prime (221021011111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666203 + ... + 941205.

It is an arithmetic number, because the mean of its divisors is an integer number (14129361765).

Almost surely, 2^221021011112 is an apocalyptic number.

221021011112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221021011112 is an abundant number, since it is smaller than the sum of its proper divisors (231118565368).

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

221021011112 is a wasteful number, since it uses less digits than its factorization.

221021011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284153 (or 284149 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221021011112 its reverse (211110120122), we get a palindrome (432131131234).

The spelling of 221021011112 in words is "two hundred twenty-one billion, twenty-one million, eleven thousand, one hundred twelve".