2121331279 has 2 divisors, whose sum is σ = 2121331280. Its totient is φ = 2121331278.

The previous prime is 2121331241. The next prime is 2121331283. The reversal of 2121331279 is 9721331212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121331279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121331279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121331879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060665639 + 1060665640.

It is an arithmetic number, because the mean of its divisors is an integer number (1060665640).

Almost surely, 2^2121331279 is an apocalyptic number.

2121331279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121331279 is an equidigital number, since it uses as much as digits as its factorization.

2121331279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 2121331279 is about 46057.9122301478. The cubic root of 2121331279 is about 1284.9005013120.

The spelling of 2121331279 in words is "two billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred seventy-nine".