221111120120 has 32 divisors (see below), whose sum is σ = 542727295920. Its totient is φ = 80404043520.

The previous prime is 221111120081. The next prime is 221111120123. The reversal of 221111120120 is 21021111122.

It is a junction number, because it is equal to n+sod(n) for n = 221111120095 and 221111120104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111120123) 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, 251262197 + ... + 251263076.

Almost surely, 2^221111120120 is an apocalyptic number.

221111120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111120120 is an abundant number, since it is smaller than the sum of its proper divisors (321616175800).

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

221111120120 is a wasteful number, since it uses less digits than its factorization.

221111120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502525295 (or 502525291 counting only the distinct ones).

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

Adding to 221111120120 its reverse (21021111122), we get a palindrome (242132231242).

The spelling of 221111120120 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred twenty thousand, one hundred twenty".