111001122121220 has 48 divisors (see below), whose sum is σ = 237511932231168. Its totient is φ = 43560610204800.

The previous prime is 111001122121181. The next prime is 111001122121261. The reversal of 111001122121220 is 22121221100111.

It is a super-2 number, since 2×111001122121220² (a number of 29 digits) contains 22 as substring.

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, 19633445 + ... + 24646995.

It is an arithmetic number, because the mean of its divisors is an integer number (4948165254816).

Almost surely, 2^{111001122121220} is an apocalyptic number.

111001122121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001122121220 is an abundant number, since it is smaller than the sum of its proper divisors (126510810109948).

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

111001122121220 is a wasteful number, since it uses less digits than its factorization.

111001122121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5034500 (or 5034498 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111001122121220 its reverse (22121221100111), we get a palindrome (133122343221331).

It can be divided in two parts, 111001 and 122121220, that added together give a palindrome (122232221).

The spelling of 111001122121220 in words is "one hundred eleven trillion, one billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty".