2123951912279 has 2 divisors, whose sum is σ = 2123951912280. Its totient is φ = 2123951912278.

The previous prime is 2123951912233. The next prime is 2123951912297. The reversal of 2123951912279 is 9722191593212.

Together with next prime (2123951912297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123951912279 is a prime.

It is a super-2 number, since 2×2123951912279² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2123951912279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123951912479) 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 as a sum of consecutive naturals, namely, 1061975956139 + 1061975956140.

It is an arithmetic number, because the mean of its divisors is an integer number (1061975956140).

Almost surely, 2^{2123951912279} is an apocalyptic number.

2123951912279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123951912279 is an equidigital number, since it uses as much as digits as its factorization.

2123951912279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 53.

The spelling of 2123951912279 in words is "two trillion, one hundred twenty-three billion, nine hundred fifty-one million, nine hundred twelve thousand, two hundred seventy-nine".