12211212113 has 4 divisors (see below), whose sum is σ = 12383201088. Its totient is φ = 12039223140.

The previous prime is 12211212109. The next prime is 12211212119. The reversal of 12211212113 is 31121211221.

It is a happy number.

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 12211212113 - 2² = 12211212109 is a prime.

It is a super-2 number, since 2×12211212113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211212091 and 12211212100.

It is not an unprimeable number, because it can be changed into a prime (12211212119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85994381 + ... + 85994522.

It is an arithmetic number, because the mean of its divisors is an integer number (3095800272).

Almost surely, 2^12211212113 is an apocalyptic number.

It is an amenable number.

12211212113 is a deficient number, since it is larger than the sum of its proper divisors (171988975).

12211212113 is an equidigital number, since it uses as much as digits as its factorization.

12211212113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171988974.

The product of its digits is 48, while the sum is 17.

Adding to 12211212113 its reverse (31121211221), we get a palindrome (43332423334).

The spelling of 12211212113 in words is "twelve billion, two hundred eleven million, two hundred twelve thousand, one hundred thirteen".