12021301111 has 16 divisors (see below), whose sum is σ = 12257930880. Its totient is φ = 11787381760.

The previous prime is 12021301091. The next prime is 12021301133. The reversal of 12021301111 is 11110312021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12021301111 - 2⁵ = 12021301079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021301091 and 12021301100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021301181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5826066 + ... + 5828128.

It is an arithmetic number, because the mean of its divisors is an integer number (766120680).

Almost surely, 2^12021301111 is an apocalyptic number.

12021301111 is a deficient number, since it is larger than the sum of its proper divisors (236629769).

12021301111 is a wasteful number, since it uses less digits than its factorization.

12021301111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12021301111 its reverse (11110312021), we get a palindrome (23131613132).

The spelling of 12021301111 in words is "twelve billion, twenty-one million, three hundred one thousand, one hundred eleven".