12031203311 has 4 divisors (see below), whose sum is σ = 12032395224. Its totient is φ = 12030011400.

The previous prime is 12031203271. The next prime is 12031203329. The reversal of 12031203311 is 11330213021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11330213021 = 11497 ⋅985493.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031203311 is a prime.

It is a super-2 number, since 2×12031203311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12031203311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231203311) 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, 580685 + ... + 601046.

It is an arithmetic number, because the mean of its divisors is an integer number (3008098806).

Almost surely, 2^12031203311 is an apocalyptic number.

12031203311 is a deficient number, since it is larger than the sum of its proper divisors (1191913).

12031203311 is a wasteful number, since it uses less digits than its factorization.

12031203311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191912.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12031203311 its reverse (11330213021), we get a palindrome (23361416332).

The spelling of 12031203311 in words is "twelve billion, thirty-one million, two hundred three thousand, three hundred eleven".