12211112009 has 4 divisors (see below), whose sum is σ = 12605018880. Its totient is φ = 11817205140.

The previous prime is 12211111937. The next prime is 12211112021. The reversal of 12211112009 is 90021111221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12211112009 - 2¹² = 12211107913 is a prime.

It is a super-2 number, since 2×12211112009² (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 (12211102009) 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, 196953389 + ... + 196953450.

It is an arithmetic number, because the mean of its divisors is an integer number (3151254720).

Almost surely, 2^12211112009 is an apocalyptic number.

It is an amenable number.

12211112009 is a deficient number, since it is larger than the sum of its proper divisors (393906871).

12211112009 is an equidigital number, since it uses as much as digits as its factorization.

12211112009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393906870.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 12211112009 in words is "twelve billion, two hundred eleven million, one hundred twelve thousand, nine".