12213320655 has 16 divisors (see below), whose sum is σ = 19672466400. Its totient is φ = 6470053248.

The previous prime is 12213320653. The next prime is 12213320657. The reversal of 12213320655 is 55602331221.

It is an interprime number because it is at equal distance from previous prime (12213320653) and next prime (12213320657).

It is not a de Polignac number, because 12213320655 - 2¹ = 12213320653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213320653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2730052 + ... + 2734521.

It is an arithmetic number, because the mean of its divisors is an integer number (1229529150).

Almost surely, 2^12213320655 is an apocalyptic number.

12213320655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12213320655 is a deficient number, since it is larger than the sum of its proper divisors (7459145745).

12213320655 is a wasteful number, since it uses less digits than its factorization.

12213320655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5464730.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 12213320655 its reverse (55602331221), we get a palindrome (67815651876).

The spelling of 12213320655 in words is "twelve billion, two hundred thirteen million, three hundred twenty thousand, six hundred fifty-five".