12212201213 has 4 divisors (see below), whose sum is σ = 12256288860. Its totient is φ = 12168113568.

The previous prime is 12212201207. The next prime is 12212201219. The reversal of 12212201213 is 31210221221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12212201207) and next prime (12212201219).

It can be written as a sum of positive squares in 2 ways, for example, as 2235587524 + 9976613689 = 47282^2 + 99883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212201213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212201191 and 12212201200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212201219) 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, 22043408 + ... + 22043961.

It is an arithmetic number, because the mean of its divisors is an integer number (3064072215).

Almost surely, 2^12212201213 is an apocalyptic number.

It is an amenable number.

12212201213 is a deficient number, since it is larger than the sum of its proper divisors (44087647).

12212201213 is an equidigital number, since it uses as much as digits as its factorization.

12212201213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44087646.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12212201213 its reverse (31210221221), we get a palindrome (43422422434).

The spelling of 12212201213 in words is "twelve billion, two hundred twelve million, two hundred one thousand, two hundred thirteen".