2126121661379 has 2 divisors, whose sum is σ = 2126121661380. Its totient is φ = 2126121661378.

The previous prime is 2126121661303. The next prime is 2126121661409. The reversal of 2126121661379 is 9731661216212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2126121661379 - 2⁸ = 2126121661123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2126121661679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063060830689 + 1063060830690.

It is an arithmetic number, because the mean of its divisors is an integer number (1063060830690).

Almost surely, 2^{2126121661379} is an apocalyptic number.

2126121661379 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126121661379 is an equidigital number, since it uses as much as digits as its factorization.

2126121661379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The spelling of 2126121661379 in words is "two trillion, one hundred twenty-six billion, one hundred twenty-one million, six hundred sixty-one thousand, three hundred seventy-nine".