12211020011 has 4 divisors (see below), whose sum is σ = 12212484000. Its totient is φ = 12209556024.

The previous prime is 12211020007. The next prime is 12211020013. The reversal of 12211020011 is 11002011221.

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

It is a cyclic number.

It is not a de Polignac number, because 12211020011 - 2² = 12211020007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211019974 and 12211020001.

It is not an unprimeable number, because it can be changed into a prime (12211020013) 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, 719411 + ... + 736188.

It is an arithmetic number, because the mean of its divisors is an integer number (3053121000).

Almost surely, 2^12211020011 is an apocalyptic number.

12211020011 is a deficient number, since it is larger than the sum of its proper divisors (1463989).

12211020011 is an equidigital number, since it uses as much as digits as its factorization.

12211020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463988.

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

Adding to 12211020011 its reverse (11002011221), we get a palindrome (23213031232).

The spelling of 12211020011 in words is "twelve billion, two hundred eleven million, twenty thousand, eleven".