1223201213 has 12 divisors (see below), whose sum is σ = 1342689300. Its totient is φ = 1113630336.

The previous prime is 1223201207. The next prime is 1223201227. The reversal of 1223201213 is 3121023221.

It can be written as a sum of positive squares in 6 ways, for example, as 42797764 + 1180403449 = 6542^2 + 34357^2 .

It is not a de Polignac number, because 1223201213 - 2⁴ = 1223201197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223201191 and 1223201200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223201233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37238 + ... + 61911.

It is an arithmetic number, because the mean of its divisors is an integer number (111890775).

Almost surely, 2^1223201213 is an apocalyptic number.

1223201213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1223201213 is a deficient number, since it is larger than the sum of its proper divisors (119488087).

1223201213 is an equidigital number, since it uses as much as digits as its factorization.

1223201213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99248 (or 99235 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1223201213 is about 34974.2936025876. The cubic root of 1223201213 is about 1069.4635016795.

Adding to 1223201213 its reverse (3121023221), we get a palindrome (4344224434).

The spelling of 1223201213 in words is "one billion, two hundred twenty-three million, two hundred one thousand, two hundred thirteen".