121026266121599 has 2 divisors, whose sum is σ = 121026266121600. Its totient is φ = 121026266121598.

The previous prime is 121026266121559. The next prime is 121026266121659. The reversal of 121026266121599 is 995121662620121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121026266121599 is a prime.

It is a super-2 number, since 2×121026266121599² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121026266121599.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121026266121559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60513133060799 + 60513133060800.

It is an arithmetic number, because the mean of its divisors is an integer number (60513133060800).

Almost surely, 2^{121026266121599} is an apocalyptic number.

121026266121599 is a deficient number, since it is larger than the sum of its proper divisors (1).

121026266121599 is an equidigital number, since it uses as much as digits as its factorization.

121026266121599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 121026266121599 in words is "one hundred twenty-one trillion, twenty-six billion, two hundred sixty-six million, one hundred twenty-one thousand, five hundred ninety-nine".