12120212021121 has 32 divisors (see below), whose sum is σ = 18156584718720. Its totient is φ = 7989962867712.

The previous prime is 12120212021089. The next prime is 12120212021123. The reversal of 12120212021121 is 12112021202121.

It is not a de Polignac number, because 12120212021121 - 2⁵ = 12120212021089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12120212021094 and 12120212021103.

It is not an unprimeable number, because it can be changed into a prime (12120212021123) 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, 1056301 + ... + 5035493.

It is an arithmetic number, because the mean of its divisors is an integer number (567393272460).

Almost surely, 2^{12120212021121} is an apocalyptic number.

It is an amenable number.

12120212021121 is a deficient number, since it is larger than the sum of its proper divisors (6036372697599).

12120212021121 is a wasteful number, since it uses less digits than its factorization.

12120212021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980462 (or 3980456 counting only the distinct ones).

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

Adding to 12120212021121 its reverse (12112021202121), we get a palindrome (24232233223242).

The spelling of 12120212021121 in words is "twelve trillion, one hundred twenty billion, two hundred twelve million, twenty-one thousand, one hundred twenty-one".