12111222013 has 4 divisors (see below), whose sum is σ = 13212242208. Its totient is φ = 11010201820.

The previous prime is 12111221977. The next prime is 12111222029. The reversal of 12111222013 is 31022211121.

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 12111222013 - 2²⁹ = 11574351101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111222113) 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, 550510081 + ... + 550510102.

It is an arithmetic number, because the mean of its divisors is an integer number (3303060552).

Almost surely, 2^12111222013 is an apocalyptic number.

It is an amenable number.

12111222013 is a deficient number, since it is larger than the sum of its proper divisors (1101020195).

12111222013 is a wasteful number, since it uses less digits than its factorization.

12111222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101020194.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12111222013 its reverse (31022211121), we get a palindrome (43133433134).

The spelling of 12111222013 in words is "twelve billion, one hundred eleven million, two hundred twenty-two thousand, thirteen".