2121222121312 has 48 divisors (see below), whose sum is σ = 4833164367360. Its totient is φ = 897587653248.

The previous prime is 2121222121289. The next prime is 2121222121327. The reversal of 2121222121312 is 2131212221212.

It is a congruent number.

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, 59917378 + ... + 59952769.

It is an arithmetic number, because the mean of its divisors is an integer number (100690924320).

Almost surely, 2^{2121222121312} is an apocalyptic number.

It is an amenable number.

2121222121312 is an abundant number, since it is smaller than the sum of its proper divisors (2711942246048).

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

2121222121312 is a wasteful number, since it uses less digits than its factorization.

2121222121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119870243 (or 119870235 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

Adding to 2121222121312 its reverse (2131212221212), we get a palindrome (4252434342524).

The spelling of 2121222121312 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, three hundred twelve".