12120220221021 has 32 divisors (see below), whose sum is σ = 19627489920000. Its totient is φ = 7330867305840.

The previous prime is 12120220220963. The next prime is 12120220221059. The reversal of 12120220221021 is 12012202202121.

It is a happy number.

12120220221021 is a `hidden beast` number, since 1 + 212 + 0 + 220 + 2 + 210 + 21 = 666.

It is not a de Polignac number, because 12120220221021 - 2⁶ = 12120220220957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12120220220985 and 12120220221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120220226021) 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, 40742401 + ... + 41038806.

It is an arithmetic number, because the mean of its divisors is an integer number (613359060000).

Almost surely, 2^{12120220221021} is an apocalyptic number.

12120220221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12120220221021 is a deficient number, since it is larger than the sum of its proper divisors (7507269698979).

12120220221021 is a wasteful number, since it uses less digits than its factorization.

12120220221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81781726 (or 81781720 counting only the distinct ones).

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

Adding to 12120220221021 its reverse (12012202202121), we get a palindrome (24132422423142).

The spelling of 12120220221021 in words is "twelve trillion, one hundred twenty billion, two hundred twenty million, two hundred twenty-one thousand, twenty-one".