12031012011 has 32 divisors (see below), whose sum is σ = 16526011392. Its totient is φ = 7781114880.

The previous prime is 12031011961. The next prime is 12031012027. The reversal of 12031012011 is 11021013021.

It is not a de Polignac number, because 12031012011 - 2¹⁰ = 12031010987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12031012061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19626141 + ... + 19626753.

It is an arithmetic number, because the mean of its divisors is an integer number (516437856).

Almost surely, 2^12031012011 is an apocalyptic number.

12031012011 is a deficient number, since it is larger than the sum of its proper divisors (4494999381).

12031012011 is a wasteful number, since it uses less digits than its factorization.

12031012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443.

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

Adding to 12031012011 its reverse (11021013021), we get a palindrome (23052025032).

The spelling of 12031012011 in words is "twelve billion, thirty-one million, twelve thousand, eleven".