12001211011 has 8 divisors (see below), whose sum is σ = 12175488000. Its totient is φ = 11827079880.

The previous prime is 12001210999. The next prime is 12001211021. The reversal of 12001211011 is 11011210021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12001211011 - 2⁹ = 12001210499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001211021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135100 + ... + 205558.

It is an arithmetic number, because the mean of its divisors is an integer number (1521936000).

Almost surely, 2^12001211011 is an apocalyptic number.

12001211011 is a deficient number, since it is larger than the sum of its proper divisors (174276989).

12001211011 is an equidigital number, since it uses as much as digits as its factorization.

12001211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72929.

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

Adding to 12001211011 its reverse (11011210021), we get a palindrome (23012421032).

The spelling of 12001211011 in words is "twelve billion, one million, two hundred eleven thousand, eleven".