111221110210220 has 48 divisors (see below), whose sum is σ = 248412393831168. Its totient is φ = 41683712286720.

The previous prime is 111221110210211. The next prime is 111221110210279. The reversal of 111221110210220 is 22012011122111.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733379141 + ... + 733530780.

It is an arithmetic number, because the mean of its divisors is an integer number (5175258204816).

Almost surely, 2^{111221110210220} is an apocalyptic number.

111221110210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221110210220 is an abundant number, since it is smaller than the sum of its proper divisors (137191283620948).

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

111221110210220 is a wasteful number, since it uses less digits than its factorization.

111221110210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466910170 (or 1466910168 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111221110210220 its reverse (22012011122111), we get a palindrome (133233121332331).

The spelling of 111221110210220 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred ten million, two hundred ten thousand, two hundred twenty".