2122212122213 has 4 divisors (see below), whose sum is σ = 2247048129420. Its totient is φ = 1997376115008.

The previous prime is 2122212122209. The next prime is 2122212122243. The reversal of 2122212122213 is 3122212122212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1812044438884 + 310167683329 = 1346122^2 + 556927^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122212122213 - 2² = 2122212122209 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 (2122212122243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62418003578 + ... + 62418003611.

It is an arithmetic number, because the mean of its divisors is an integer number (561762032355).

Almost surely, 2^{2122212122213} is an apocalyptic number.

It is an amenable number.

2122212122213 is a deficient number, since it is larger than the sum of its proper divisors (124836007207).

2122212122213 is a wasteful number, since it uses less digits than its factorization.

2122212122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124836007206.

The product of its digits is 768, while the sum is 23.

Adding to 2122212122213 its reverse (3122212122212), we get a palindrome (5244424244425).

Subtracting 2122212122213 from its reverse (3122212122212), we obtain a palindrome (999999999999).

The spelling of 2122212122213 in words is "two trillion, one hundred twenty-two billion, two hundred twelve million, one hundred twenty-two thousand, two hundred thirteen".