12012211220220 has 96 divisors (see below), whose sum is σ = 37520213955840. Its totient is φ = 3190494312000.

The previous prime is 12012211220189. The next prime is 12012211220227. The reversal of 12012211220220 is 2202211221021.

It is a happy number.

12012211220220 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 221 + 1 + 220 + 220 = 666.

It is a super-2 number, since 2×12012211220220² (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 = 12012211220193 and 12012211220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012211220227) 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, 44176882 + ... + 44447961.

It is an arithmetic number, because the mean of its divisors is an integer number (390835562040).

Almost surely, 2^{12012211220220} is an apocalyptic number.

12012211220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012211220220 is an abundant number, since it is smaller than the sum of its proper divisors (25508002735620).

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

12012211220220 is a wasteful number, since it uses less digits than its factorization.

12012211220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88625112 (or 88625104 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12012211220220 its reverse (2202211221021), we get a palindrome (14214422441241).

The spelling of 12012211220220 in words is "twelve trillion, twelve billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty".