21050130123079 has 2 divisors, whose sum is σ = 21050130123080. Its totient is φ = 21050130123078.

The previous prime is 21050130123059. The next prime is 21050130123107. The reversal of 21050130123079 is 97032103105012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21050130123079 - 2¹³ = 21050130114887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21050130123019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10525065061539 + 10525065061540.

It is an arithmetic number, because the mean of its divisors is an integer number (10525065061540).

Almost surely, 2^{21050130123079} is an apocalyptic number.

21050130123079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21050130123079 is an equidigital number, since it uses as much as digits as its factorization.

21050130123079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The spelling of 21050130123079 in words is "twenty-one trillion, fifty billion, one hundred thirty million, one hundred twenty-three thousand, seventy-nine".