120991139417 has 4 divisors (see below), whose sum is σ = 120992294160. Its totient is φ = 120989984676.

The previous prime is 120991139389. The next prime is 120991139449. The reversal of 120991139417 is 714931199021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120991139417 - 2²⁰ = 120990090841 is a prime.

It is a super-3 number, since 3×120991139417³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120991135417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402563 + ... + 635640.

It is an arithmetic number, because the mean of its divisors is an integer number (30248073540).

Almost surely, 2^120991139417 is an apocalyptic number.

It is an amenable number.

120991139417 is a deficient number, since it is larger than the sum of its proper divisors (1154743).

120991139417 is a wasteful number, since it uses less digits than its factorization.

120991139417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154742.

The product of its (nonzero) digits is 122472, while the sum is 47.

The spelling of 120991139417 in words is "one hundred twenty billion, nine hundred ninety-one million, one hundred thirty-nine thousand, four hundred seventeen".