12011023311 has 64 divisors (see below), whose sum is σ = 19620817920. Its totient is φ = 6379683840.

The previous prime is 12011023303. The next prime is 12011023327. The reversal of 12011023311 is 11332011021.

It is a happy number.

It is not a de Polignac number, because 12011023311 - 2³ = 12011023303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011023301) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11786560 + ... + 11787578.

It is an arithmetic number, because the mean of its divisors is an integer number (306575280).

Almost surely, 2^12011023311 is an apocalyptic number.

12011023311 is a deficient number, since it is larger than the sum of its proper divisors (7609794609).

12011023311 is a wasteful number, since it uses less digits than its factorization.

12011023311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 12011023311 its reverse (11332011021), we get a palindrome (23343034332).

The spelling of 12011023311 in words is "twelve billion, eleven million, twenty-three thousand, three hundred eleven".