120985206913 has 4 divisors (see below), whose sum is σ = 120986010288. Its totient is φ = 120984403540.

The previous prime is 120985206907. The next prime is 120985206917. The reversal of 120985206913 is 319602589021.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 319602589021 = 379 ⋅843278599.

It is a cyclic number.

It is not a de Polignac number, because 120985206913 - 2³³ = 112395272321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120985206917) 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, 100531 + ... + 502072.

It is an arithmetic number, because the mean of its divisors is an integer number (30246502572).

Almost surely, 2^120985206913 is an apocalyptic number.

It is an amenable number.

120985206913 is a deficient number, since it is larger than the sum of its proper divisors (803375).

120985206913 is an equidigital number, since it uses as much as digits as its factorization.

120985206913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803374.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 120985206913 in words is "one hundred twenty billion, nine hundred eighty-five million, two hundred six thousand, nine hundred thirteen".