111111220122100 has 72 divisors (see below), whose sum is σ = 263047246586208. Its totient is φ = 40401516988800.

The previous prime is 111111220121989. The next prime is 111111220122137. The reversal of 111111220122100 is 1221022111111.

It is a congruent number.

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, 14187382 + ... + 20579218.

It is an arithmetic number, because the mean of its divisors is an integer number (3653433980364).

Almost surely, 2^{111111220122100} is an apocalyptic number.

111111220122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111220122100 is an abundant number, since it is smaller than the sum of its proper divisors (151936026464108).

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

111111220122100 is a wasteful number, since it uses less digits than its factorization.

111111220122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6407665 (or 6407658 counting only the distinct ones).

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

Adding to 111111220122100 its reverse (1221022111111), we get a palindrome (112332242233211).

It can be divided in two parts, 1111112 and 20122100, that added together give a palindrome (21233212).

The spelling of 111111220122100 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred twenty million, one hundred twenty-two thousand, one hundred".