121340331999 has 12 divisors (see below), whose sum is σ = 175540272336. Its totient is φ = 80768522112.

The previous prime is 121340331971. The next prime is 121340332027. The reversal of 121340331999 is 999133043121.

It is a happy number.

121340331999 is a `hidden beast` number, since 121 + 3 + 403 + 31 + 9 + 99 = 666.

It is an interprime number because it is at equal distance from previous prime (121340331971) and next prime (121340332027).

It is not a de Polignac number, because 121340331999 - 2⁸ = 121340331743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121340331899) 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 11 ways as a sum of consecutive naturals, for example, 10413234 + ... + 10424879.

It is an arithmetic number, because the mean of its divisors is an integer number (14628356028).

Almost surely, 2^121340331999 is an apocalyptic number.

121340331999 is a deficient number, since it is larger than the sum of its proper divisors (54199940337).

121340331999 is a wasteful number, since it uses less digits than its factorization.

121340331999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20838766 (or 20838763 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The spelling of 121340331999 in words is "one hundred twenty-one billion, three hundred forty million, three hundred thirty-one thousand, nine hundred ninety-nine".