12213001331 has 4 divisors (see below), whose sum is σ = 12931413192. Its totient is φ = 11494589472.

The previous prime is 12213001327. The next prime is 12213001349. The reversal of 12213001331 is 13310031221.

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 12213001331 - 2² = 12213001327 is a prime.

It is a super-2 number, since 2×12213001331² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 718411843 = 12213001331 / (1 + 2 + 2 + 1 + 3 + 0 + 0 + 1 + 3 + 3 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12213001301) 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, 359205905 + ... + 359205938.

It is an arithmetic number, because the mean of its divisors is an integer number (3232853298).

Almost surely, 2^12213001331 is an apocalyptic number.

12213001331 is a deficient number, since it is larger than the sum of its proper divisors (718411861).

12213001331 is an equidigital number, since it uses as much as digits as its factorization.

12213001331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718411860.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12213001331 its reverse (13310031221), we get a palindrome (25523032552).

The spelling of 12213001331 in words is "twelve billion, two hundred thirteen million, one thousand, three hundred thirty-one".