12021230111311 has 4 divisors (see below), whose sum is σ = 12021254254152. Its totient is φ = 12021205968472.

The previous prime is 12021230111239. The next prime is 12021230111327. The reversal of 12021230111311 is 11311103212021.

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 12021230111311 - 2²⁵ = 12021196556879 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 (12021230111381) 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, 11308465 + ... + 12325738.

It is an arithmetic number, because the mean of its divisors is an integer number (3005313563538).

Almost surely, 2^{12021230111311} is an apocalyptic number.

12021230111311 is a deficient number, since it is larger than the sum of its proper divisors (24142841).

12021230111311 is an equidigital number, since it uses as much as digits as its factorization.

12021230111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24142840.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 12021230111311 its reverse (11311103212021), we get a palindrome (23332333323332).

The spelling of 12021230111311 in words is "twelve trillion, twenty-one billion, two hundred thirty million, one hundred eleven thousand, three hundred eleven".