2121127964959 has 2 divisors, whose sum is σ = 2121127964960. Its totient is φ = 2121127964958.

The previous prime is 2121127964941. The next prime is 2121127965059. The reversal of 2121127964959 is 9594697211212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121127964959 - 2¹⁹ = 2121127440671 is a prime.

It is a super-2 number, since 2×2121127964959² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121127964759) 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, 1060563982479 + 1060563982480.

It is an arithmetic number, because the mean of its divisors is an integer number (1060563982480).

Almost surely, 2^{2121127964959} is an apocalyptic number.

2121127964959 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121127964959 is an equidigital number, since it uses as much as digits as its factorization.

2121127964959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 58.

The spelling of 2121127964959 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-seven million, nine hundred sixty-four thousand, nine hundred fifty-nine".