111222122121120 has 96 divisors (see below), whose sum is σ = 350351159602752. Its totient is φ = 29659107704832.

The previous prime is 111222122121029. The next prime is 111222122121133. The reversal of 111222122121120 is 21121221222111.

It is a tau number, because it is divible by the number of its divisors (96).

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, 196110279 + ... + 196676601.

It is an arithmetic number, because the mean of its divisors is an integer number (3649491245862).

Almost surely, 2^{111222122121120} is an apocalyptic number.

111222122121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222122121120 is an abundant number, since it is smaller than the sum of its proper divisors (239129037481632).

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

111222122121120 is a wasteful number, since it uses less digits than its factorization.

111222122121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975494 (or 975486 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 111222122121120 its reverse (21121221222111), we get a palindrome (132343343343231).

The spelling of 111222122121120 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty".