12023021111 has 4 divisors (see below), whose sum is σ = 12089446824. Its totient is φ = 11956595400.

The previous prime is 12023021107. The next prime is 12023021123. The reversal of 12023021111 is 11112032021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112032021 = 23 ⋅483131827.

It is a cyclic number.

It is not a de Polignac number, because 12023021111 - 2² = 12023021107 is a prime.

It is a super-3 number, since 3×12023021111³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023021611) 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, 33212585 + ... + 33212946.

It is an arithmetic number, because the mean of its divisors is an integer number (3022361706).

Almost surely, 2^12023021111 is an apocalyptic number.

12023021111 is a deficient number, since it is larger than the sum of its proper divisors (66425713).

12023021111 is an equidigital number, since it uses as much as digits as its factorization.

12023021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66425712.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12023021111 its reverse (11112032021), we get a palindrome (23135053132).

The spelling of 12023021111 in words is "twelve billion, twenty-three million, twenty-one thousand, one hundred eleven".