121041399 has 4 divisors (see below), whose sum is σ = 161388536. Its totient is φ = 80694264.

The previous prime is 121041383. The next prime is 121041413. The reversal of 121041399 is 993140121.

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

It is not a de Polignac number, because 121041399 - 2⁴ = 121041383 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 (121041379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20173564 + ... + 20173569.

It is an arithmetic number, because the mean of its divisors is an integer number (40347134).

Almost surely, 2^121041399 is an apocalyptic number.

121041399 is a deficient number, since it is larger than the sum of its proper divisors (40347137).

121041399 is an equidigital number, since it uses as much as digits as its factorization.

121041399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40347136.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 121041399 is about 11001.8816117971. The cubic root of 121041399 is about 494.6651464532.

The spelling of 121041399 in words is "one hundred twenty-one million, forty-one thousand, three hundred ninety-nine".