111221201022210 has 48 divisors (see below), whose sum is σ = 301747954083264. Its totient is φ = 28369465767456.

The previous prime is 111221201022209. The next prime is 111221201022223. The reversal of 111221201022210 is 12220102122111.

111221201022210 is a `hidden beast` number, since 1 + 11 + 221 + 201 + 0 + 22 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26865022332 + ... + 26865026471.

It is an arithmetic number, because the mean of its divisors is an integer number (6286415710068).

Almost surely, 2^{111221201022210} is an apocalyptic number.

111221201022210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111221201022210 is an abundant number, since it is smaller than the sum of its proper divisors (190526753061054).

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

111221201022210 is a wasteful number, since it uses less digits than its factorization.

111221201022210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53730048839 (or 53730048836 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111221201022210 its reverse (12220102122111), we get a palindrome (123441303144321).

The spelling of 111221201022210 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred one million, twenty-two thousand, two hundred ten".