2121130399 has 2 divisors, whose sum is σ = 2121130400. Its totient is φ = 2121130398.

The previous prime is 2121130381. The next prime is 2121130423. The reversal of 2121130399 is 9930311212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121130399 - 2⁹ = 2121129887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121130399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121130309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060565199 + 1060565200.

It is an arithmetic number, because the mean of its divisors is an integer number (1060565200).

Almost surely, 2^2121130399 is an apocalyptic number.

2121130399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121130399 is an equidigital number, since it uses as much as digits as its factorization.

2121130399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 2121130399 is about 46055.7314457169. The cubic root of 2121130399 is about 1284.8599420394.

The spelling of 2121130399 in words is "two billion, one hundred twenty-one million, one hundred thirty thousand, three hundred ninety-nine".