2121321122212 has 12 divisors (see below), whose sum is σ = 3712322321820. Its totient is φ = 1060657601696.

The previous prime is 2121321122159. The next prime is 2121321122227. The reversal of 2121321122212 is 2122211231212.

It can be written as a sum of positive squares in 2 ways, for example, as 1101693747456 + 1019627374756 = 1049616^2 + 1009766^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2001858 + ... + 2872294.

It is an arithmetic number, because the mean of its divisors is an integer number (309360193485).

Almost surely, 2^{2121321122212} is an apocalyptic number.

It is an amenable number.

2121321122212 is a deficient number, since it is larger than the sum of its proper divisors (1591001199608).

2121321122212 is a wasteful number, since it uses less digits than its factorization.

2121321122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479710 (or 1479708 counting only the distinct ones).

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

Adding to 2121321122212 its reverse (2122211231212), we get a palindrome (4243532353424).

The spelling of 2121321122212 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-one million, one hundred twenty-two thousand, two hundred twelve".