2121121131312 has 40 divisors (see below), whose sum is σ = 5500884211056. Its totient is φ = 704289243136.

The previous prime is 2121121131293. The next prime is 2121121131407. The reversal of 2121121131312 is 2131311211212.

It is a nude number because it is divisible by every one of its digits.

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, 85960473 + ... + 85985144.

Almost surely, 2^{2121121131312} is an apocalyptic number.

It is an amenable number.

2121121131312 is an abundant number, since it is smaller than the sum of its proper divisors (3379763079744).

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

2121121131312 is a wasteful number, since it uses less digits than its factorization.

2121121131312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171945885 (or 171945879 counting only the distinct ones).

The product of its digits is 144, while the sum is 21.

Adding to 2121121131312 its reverse (2131311211212), we get a palindrome (4252432342524).

The spelling of 2121121131312 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred twelve".