12122112011220 has 72 divisors (see below), whose sum is σ = 37114055151264. Its totient is φ = 3202352326848.

The previous prime is 12122112011183. The next prime is 12122112011231. The reversal of 12122112011220 is 2211021122121.

12122112011220 is a `hidden beast` number, since 1 + 21 + 221 + 1 + 201 + 1 + 220 = 666.

It is a super-2 number, since 2×12122112011220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12122112011193 and 12122112011202.

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, 314677314 + ... + 314715833.

It is an arithmetic number, because the mean of its divisors is an integer number (515472988212).

Almost surely, 2^{12122112011220} is an apocalyptic number.

12122112011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122112011220 is an abundant number, since it is smaller than the sum of its proper divisors (24991943140044).

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

12122112011220 is a wasteful number, since it uses less digits than its factorization.

12122112011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629393269 (or 629393264 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12122112011220 its reverse (2211021122121), we get a palindrome (14333133133341).

The spelling of 12122112011220 in words is "twelve trillion, one hundred twenty-two billion, one hundred twelve million, eleven thousand, two hundred twenty".