2122121212311 has 4 divisors (see below), whose sum is σ = 2829494949752. Its totient is φ = 1414747474872.

The previous prime is 2122121212297. The next prime is 2122121212373. The reversal of 2122121212311 is 1132121212212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2122121212311 - 2⁵ = 2122121212279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122121212391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353686868716 + ... + 353686868721.

It is an arithmetic number, because the mean of its divisors is an integer number (707373737438).

Almost surely, 2^{2122121212311} is an apocalyptic number.

2122121212311 is a deficient number, since it is larger than the sum of its proper divisors (707373737441).

2122121212311 is an equidigital number, since it uses as much as digits as its factorization.

2122121212311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707373737440.

The product of its digits is 192, while the sum is 21.

Adding to 2122121212311 its reverse (1132121212212), we get a palindrome (3254242424523).

Subtracting from 2122121212311 its reverse (1132121212212), we obtain a palindrome (990000000099).

The spelling of 2122121212311 in words is "two trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred twelve thousand, three hundred eleven".