12011203221111 has 6 divisors (see below), whose sum is σ = 17349515763840. Its totient is φ = 8007468814068.

The previous prime is 12011203221091. The next prime is 12011203221119. The reversal of 12011203221111 is 11112230211021.

It is a happy number.

12011203221111 is a `hidden beast` number, since 1 + 201 + 120 + 322 + 11 + 11 = 666.

12011203221111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12011203221111 - 2¹⁸ = 12011202958967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011203221119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667289067831 + ... + 667289067848.

It is an arithmetic number, because the mean of its divisors is an integer number (2891585960640).

Almost surely, 2^{12011203221111} is an apocalyptic number.

12011203221111 is a deficient number, since it is larger than the sum of its proper divisors (5338312542729).

12011203221111 is a wasteful number, since it uses less digits than its factorization.

12011203221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334578135685 (or 1334578135682 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 12011203221111 its reverse (11112230211021), we get a palindrome (23123433432132).

The spelling of 12011203221111 in words is "twelve trillion, eleven billion, two hundred three million, two hundred twenty-one thousand, one hundred eleven".