111210221211220 has 96 divisors (see below), whose sum is σ = 249149862662400. Its totient is φ = 41627506099200.

The previous prime is 111210221211179. The next prime is 111210221211281. The reversal of 111210221211220 is 22112122012111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20456721 + ... + 25315960.

It is an arithmetic number, because the mean of its divisors is an integer number (2595311069400).

Almost surely, 2^{111210221211220} is an apocalyptic number.

111210221211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111210221211220 is an abundant number, since it is smaller than the sum of its proper divisors (137939641451180).

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

111210221211220 is a wasteful number, since it uses less digits than its factorization.

111210221211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45772849 (or 45772847 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111210221211220 its reverse (22112122012111), we get a palindrome (133322343223331).

The spelling of 111210221211220 in words is "one hundred eleven trillion, two hundred ten billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty".