12011011012 has 96 divisors (see below), whose sum is σ = 28257304320. Its totient is φ = 4314193920.

The previous prime is 12011011009. The next prime is 12011011021. The reversal of 12011011012 is 21011011021.

It is a self number, because there is not a number n which added to its sum of digits gives 12011011012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4519188 + ... + 4521844.

It is an arithmetic number, because the mean of its divisors is an integer number (294346920).

Almost surely, 2^12011011012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011011012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14128652160).

12011011012 is an abundant number, since it is smaller than the sum of its proper divisors (16246293308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12011011012 is a wasteful number, since it uses less digits than its factorization.

12011011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821 (or 3819 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12011011012 its reverse (21011011021), we get a palindrome (33022022033).

Subtracting 12011011012 from its reverse (21011011021), we obtain a palindrome (9000000009).

The spelling of 12011011012 in words is "twelve billion, eleven million, eleven thousand, twelve".