12011201211 has 4 divisors (see below), whose sum is σ = 16014934952. Its totient is φ = 8007467472.

The previous prime is 12011201173. The next prime is 12011201221. The reversal of 12011201211 is 11210211021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12011201211 - 2¹⁸ = 12010939067 is a prime.

It is a super-2 number, since 2×12011201211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011201221) 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, 2001866866 + ... + 2001866871.

It is an arithmetic number, because the mean of its divisors is an integer number (4003733738).

Almost surely, 2^12011201211 is an apocalyptic number.

12011201211 is a deficient number, since it is larger than the sum of its proper divisors (4003733741).

12011201211 is an equidigital number, since it uses as much as digits as its factorization.

12011201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003733740.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12011201211 its reverse (11210211021), we get a palindrome (23221412232).

The spelling of 12011201211 in words is "twelve billion, eleven million, two hundred one thousand, two hundred eleven".