12220012121121 has 64 divisors (see below), whose sum is σ = 21568846233600. Its totient is φ = 6690703032000.

The previous prime is 12220012121111. The next prime is 12220012121137. The reversal of 12220012121121 is 12112121002221.

It is not a de Polignac number, because 12220012121121 - 2¹⁷ = 12220011990049 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12220012121094 and 12220012121103.

It is not an unprimeable number, because it can be changed into a prime (12220012121111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9733401 + ... + 10916918.

It is an arithmetic number, because the mean of its divisors is an integer number (337013222400).

Almost surely, 2^{12220012121121} is an apocalyptic number.

It is an amenable number.

12220012121121 is a deficient number, since it is larger than the sum of its proper divisors (9348834112479).

12220012121121 is a wasteful number, since it uses less digits than its factorization.

12220012121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20650467 (or 20650461 counting only the distinct ones).

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

Adding to 12220012121121 its reverse (12112121002221), we get a palindrome (24332133123342).

The spelling of 12220012121121 in words is "twelve trillion, two hundred twenty billion, twelve million, one hundred twenty-one thousand, one hundred twenty-one".