121125799 has 4 divisors (see below), whose sum is σ = 128250864. Its totient is φ = 114000736.

The previous prime is 121125793. The next prime is 121125839. The reversal of 121125799 is 997521121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 997521121 = 17 ⋅58677713.

It is a cyclic number.

It is not a de Polignac number, because 121125799 - 2²¹ = 119028647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121125793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3562507 + ... + 3562540.

It is an arithmetic number, because the mean of its divisors is an integer number (32062716).

Almost surely, 2^121125799 is an apocalyptic number.

121125799 is a deficient number, since it is larger than the sum of its proper divisors (7125065).

121125799 is an equidigital number, since it uses as much as digits as its factorization.

121125799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7125064.

The product of its digits is 11340, while the sum is 37.

The square root of 121125799 is about 11005.7166509047. The cubic root of 121125799 is about 494.7800934567.

The spelling of 121125799 in words is "one hundred twenty-one million, one hundred twenty-five thousand, seven hundred ninety-nine".