111102123220 has 48 divisors (see below), whose sum is σ = 254547796608. Its totient is φ = 40397132160.

The previous prime is 111102123193. The next prime is 111102123239. The reversal of 111102123220 is 22321201111.

It is a junction number, because it is equal to n+sod(n) for n = 111102123194 and 111102123203.

It is a congruent number.

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, 4212394 + ... + 4238686.

It is an arithmetic number, because the mean of its divisors is an integer number (5303079096).

Almost surely, 2^111102123220 is an apocalyptic number.

111102123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111102123220 is an abundant number, since it is smaller than the sum of its proper divisors (143445673388).

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

111102123220 is a wasteful number, since it uses less digits than its factorization.

111102123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45520 (or 45518 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111102123220 its reverse (22321201111), we get a palindrome (133423324331).

The spelling of 111102123220 in words is "one hundred eleven billion, one hundred two million, one hundred twenty-three thousand, two hundred twenty".