1223211213 has 96 divisors (see below), whose sum is σ = 2194133760. Its totient is φ = 666247680.

The previous prime is 1223211193. The next prime is 1223211233. The reversal of 1223211213 is 3121123221.

It is an interprime number because it is at equal distance from previous prime (1223211193) and next prime (1223211233).

It is not a de Polignac number, because 1223211213 - 2⁵ = 1223211181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223211233) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6757983 + ... + 6758163.

It is an arithmetic number, because the mean of its divisors is an integer number (22855560).

Almost surely, 2^1223211213 is an apocalyptic number.

It is an amenable number.

1223211213 is a deficient number, since it is larger than the sum of its proper divisors (970922547).

1223211213 is a wasteful number, since it uses less digits than its factorization.

1223211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 357 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1223211213 is about 34974.4365644395. The cubic root of 1223211213 is about 1069.4664160558.

Adding to 1223211213 its reverse (3121123221), we get a palindrome (4344334434).

The spelling of 1223211213 in words is "one billion, two hundred twenty-three million, two hundred eleven thousand, two hundred thirteen".