1243222213 has 12 divisors (see below), whose sum is σ = 1278273024. Its totient is φ = 1209106400.

The previous prime is 1243222207. The next prime is 1243222229. The reversal of 1243222213 is 3122223421.

It is not a de Polignac number, because 1243222213 - 2¹⁷ = 1243091141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243222613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 642858 + ... + 644788.

It is an arithmetic number, because the mean of its divisors is an integer number (106522752).

Almost surely, 2^1243222213 is an apocalyptic number.

It is an amenable number.

1243222213 is a deficient number, since it is larger than the sum of its proper divisors (35050811).

1243222213 is an equidigital number, since it uses as much as digits as its factorization.

1243222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396 (or 2355 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 1243222213 is about 35259.3563894748. The cubic root of 1243222213 is about 1075.2668421405.

Adding to 1243222213 its reverse (3122223421), we get a palindrome (4365445634).

The spelling of 1243222213 in words is "one billion, two hundred forty-three million, two hundred twenty-two thousand, two hundred thirteen".