111121221102 has 64 divisors (see below), whose sum is σ = 229156853760. Its totient is φ = 35896328064.

The previous prime is 111121221007. The next prime is 111121221161. The reversal of 111121221102 is 201122121111.

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, 100198924 + ... + 100200032.

It is an arithmetic number, because the mean of its divisors is an integer number (3580575840).

Almost surely, 2^111121221102 is an apocalyptic number.

111121221102 is an abundant number, since it is smaller than the sum of its proper divisors (118035632658).

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

111121221102 is a wasteful number, since it uses less digits than its factorization.

111121221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111121221102 its reverse (201122121111), we get a palindrome (312243342213).

Subtracting 111121221102 from its reverse (201122121111), we obtain a palindrome (90000900009).

The spelling of 111121221102 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred two".