121541799 has 4 divisors (see below), whose sum is σ = 162055736. Its totient is φ = 81027864.

The previous prime is 121541767. The next prime is 121541807. The reversal of 121541799 is 997145121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121541799 - 2⁵ = 121541767 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 (121541699) 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, 20256964 + ... + 20256969.

It is an arithmetic number, because the mean of its divisors is an integer number (40513934).

Almost surely, 2^121541799 is an apocalyptic number.

121541799 is a deficient number, since it is larger than the sum of its proper divisors (40513937).

121541799 is an equidigital number, since it uses as much as digits as its factorization.

121541799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40513936.

The product of its digits is 22680, while the sum is 39.

The square root of 121541799 is about 11024.5997206248. The cubic root of 121541799 is about 495.3458780474.

The spelling of 121541799 in words is "one hundred twenty-one million, five hundred forty-one thousand, seven hundred ninety-nine".