12320520011 has 4 divisors (see below), whose sum is σ = 12410450952. Its totient is φ = 12230589072.

The previous prime is 12320519989. The next prime is 12320520133. The reversal of 12320520011 is 11002502321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11002502321 = 43 ⋅255872147.

It is a cyclic number.

It is not a de Polignac number, because 12320520011 - 2⁶ = 12320519947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15320520011) 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, 44965265 + ... + 44965538.

It is an arithmetic number, because the mean of its divisors is an integer number (3102612738).

Almost surely, 2^12320520011 is an apocalyptic number.

12320520011 is a deficient number, since it is larger than the sum of its proper divisors (89930941).

12320520011 is an equidigital number, since it uses as much as digits as its factorization.

12320520011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89930940.

The product of its (nonzero) digits is 120, while the sum is 17.

The spelling of 12320520011 in words is "twelve billion, three hundred twenty million, five hundred twenty thousand, eleven".