2123121212313 has 4 divisors (see below), whose sum is σ = 2830828283088. Its totient is φ = 1415414141540.

The previous prime is 2123121212291. The next prime is 2123121212327. The reversal of 2123121212313 is 3132121213212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2123121212313 - 2²⁸ = 2122852776857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123121212213) 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, 353853535383 + ... + 353853535388.

It is an arithmetic number, because the mean of its divisors is an integer number (707707070772).

Almost surely, 2^{2123121212313} is an apocalyptic number.

It is an amenable number.

2123121212313 is a deficient number, since it is larger than the sum of its proper divisors (707707070775).

2123121212313 is an equidigital number, since it uses as much as digits as its factorization.

2123121212313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707707070774.

The product of its digits is 864, while the sum is 24.

Adding to 2123121212313 its reverse (3132121213212), we get a palindrome (5255242425525).

The spelling of 2123121212313 in words is "two trillion, one hundred twenty-three billion, one hundred twenty-one million, two hundred twelve thousand, three hundred thirteen".