12120312132011 has 4 divisors (see below), whose sum is σ = 12120943056024. Its totient is φ = 12119681208000.

The previous prime is 12120312131999. The next prime is 12120312132037. The reversal of 12120312132011 is 11023121302121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12120312132011 - 2¹⁸ = 12120311869867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120312132091) 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, 315433190 + ... + 315471611.

It is an arithmetic number, because the mean of its divisors is an integer number (3030235764006).

Almost surely, 2^{12120312132011} is an apocalyptic number.

12120312132011 is a deficient number, since it is larger than the sum of its proper divisors (630924013).

12120312132011 is an equidigital number, since it uses as much as digits as its factorization.

12120312132011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630924012.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12120312132011 its reverse (11023121302121), we get a palindrome (23143433434132).

The spelling of 12120312132011 in words is "twelve trillion, one hundred twenty billion, three hundred twelve million, one hundred thirty-two thousand, eleven".