12001212011 has 4 divisors (see below), whose sum is σ = 12047909592. Its totient is φ = 11954514432.

The previous prime is 12001211987. The next prime is 12001212019. The reversal of 12001212011 is 11021210021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11021210021 = 32531 ⋅338791.

It is a cyclic number.

It is not a de Polignac number, because 12001212011 - 2¹⁰ = 12001210987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001211983 and 12001212001.

It is not an unprimeable number, because it can be changed into a prime (12001212019) 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, 23348405 + ... + 23348918.

It is an arithmetic number, because the mean of its divisors is an integer number (3011977398).

Almost surely, 2^12001212011 is an apocalyptic number.

12001212011 is a deficient number, since it is larger than the sum of its proper divisors (46697581).

12001212011 is an equidigital number, since it uses as much as digits as its factorization.

12001212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46697580.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12001212011 its reverse (11021210021), we get a palindrome (23022422032).

The spelling of 12001212011 in words is "twelve billion, one million, two hundred twelve thousand, eleven".