111221112120102 has 96 divisors (see below), whose sum is σ = 264644939561184. Its totient is φ = 33613709184000.

The previous prime is 111221112120089. The next prime is 111221112120143. The reversal of 111221112120102 is 201021211122111.

It is a happy number.

111221112120102 is a `hidden beast` number, since 111 + 221 + 112 + 120 + 102 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47487424 + ... + 49774467.

It is an arithmetic number, because the mean of its divisors is an integer number (2756718120429).

Almost surely, 2^{111221112120102} is an apocalyptic number.

111221112120102 is an abundant number, since it is smaller than the sum of its proper divisors (153423827441082).

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

111221112120102 is a wasteful number, since it uses less digits than its factorization.

111221112120102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97262054 (or 97262051 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111221112120102 its reverse (201021211122111), we get a palindrome (312242323242213).

The spelling of 111221112120102 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twelve million, one hundred twenty thousand, one hundred two".