12011212112220 has 96 divisors (see below), whose sum is σ = 37368801960000. Its totient is φ = 3202939625472.

The previous prime is 12011212112209. The next prime is 12011212112227. The reversal of 12011212112220 is 2221121211021.

12011212112220 is a `hidden beast` number, since 120 + 1 + 1 + 212 + 112 + 220 = 666.

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 = 12011212112193 and 12011212112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011212112227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45150156 + ... + 45415404.

It is an arithmetic number, because the mean of its divisors is an integer number (389258353750).

Almost surely, 2^{12011212112220} is an apocalyptic number.

12011212112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011212112220 is an abundant number, since it is smaller than the sum of its proper divisors (25357589847780).

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

12011212112220 is a wasteful number, since it uses less digits than its factorization.

12011212112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349124 (or 349116 counting only the distinct ones).

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

Adding to 12011212112220 its reverse (2221121211021), we get a palindrome (14232333323241).

The spelling of 12011212112220 in words is "twelve trillion, eleven billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty".