111111211220120 has 32 divisors (see below), whose sum is σ = 250169030392320. Its totient is φ = 44414474684160.

The previous prime is 111111211220101. The next prime is 111111211220143. The reversal of 111111211220120 is 21022112111111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937746392 + ... + 937864871.

It is an arithmetic number, because the mean of its divisors is an integer number (7817782199760).

Almost surely, 2^{111111211220120} is an apocalyptic number.

111111211220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111211220120 is an abundant number, since it is smaller than the sum of its proper divisors (139057819172200).

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

111111211220120 is a wasteful number, since it uses less digits than its factorization.

111111211220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875612755 (or 1875612751 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111111211220120 its reverse (21022112111111), we get a palindrome (132133323331231).

The spelling of 111111211220120 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred eleven million, two hundred twenty thousand, one hundred twenty".