12120999967 has 4 divisors (see below), whose sum is σ = 12121257496. Its totient is φ = 12120742440.

The previous prime is 12120999953. The next prime is 12120999997. The reversal of 12120999967 is 76999902121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76999902121 = 73883 ⋅1042187.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120999967 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 (12120999997) 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, 35784 + ... + 159757.

It is an arithmetic number, because the mean of its divisors is an integer number (3030314374).

Almost surely, 2^12120999967 is an apocalyptic number.

12120999967 is a deficient number, since it is larger than the sum of its proper divisors (257529).

12120999967 is an equidigital number, since it uses as much as digits as its factorization.

12120999967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257528.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 12120999967 in words is "twelve billion, one hundred twenty million, nine hundred ninety-nine thousand, nine hundred sixty-seven".