121791263 has 12 divisors (see below), whose sum is σ = 134000232. Its totient is φ = 109779120.

The previous prime is 121791253. The next prime is 121791269. The reversal of 121791263 is 362197121.

It is not a de Polignac number, because 121791263 - 2¹⁰ = 121790239 is a prime.

It is a super-2 number, since 2×121791263² = 29666223486270338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121791269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306581 + ... + 306977.

It is an arithmetic number, because the mean of its divisors is an integer number (11166686).

Almost surely, 2^121791263 is an apocalyptic number.

121791263 is a deficient number, since it is larger than the sum of its proper divisors (12208969).

121791263 is an equidigital number, since it uses as much as digits as its factorization.

121791263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 575 counting only the distinct ones).

The product of its digits is 4536, while the sum is 32.

The square root of 121791263 is about 11035.9078919679. The cubic root of 121791263 is about 495.6845448502.

The spelling of 121791263 in words is "one hundred twenty-one million, seven hundred ninety-one thousand, two hundred sixty-three".