12121222120012 has 24 divisors (see below), whose sum is σ = 22328765625600. Its totient is φ = 5741580471696.

The previous prime is 12121222120001. The next prime is 12121222120103. The reversal of 12121222120012 is 21002122212121.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8711289 + ... + 10006447.

It is an arithmetic number, because the mean of its divisors is an integer number (930365234400).

Almost surely, 2^{12121222120012} is an apocalyptic number.

It is an amenable number.

12121222120012 is a deficient number, since it is larger than the sum of its proper divisors (10207543505588).

12121222120012 is a wasteful number, since it uses less digits than its factorization.

12121222120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418325 (or 1418323 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12121222120012 its reverse (21002122212121), we get a palindrome (33123344332133).

The spelling of 12121222120012 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, twelve".