1223213311 has 8 divisors (see below), whose sum is σ = 1274288400. Its totient is φ = 1173149760.

The previous prime is 1223213279. The next prime is 1223213333. The reversal of 1223213311 is 1133123221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223213311 - 2⁵ = 1223213279 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 (1223213351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250416 + ... + 255253.

It is an arithmetic number, because the mean of its divisors is an integer number (159286050).

Almost surely, 2^1223213311 is an apocalyptic number.

1223213311 is a deficient number, since it is larger than the sum of its proper divisors (51075089).

1223213311 is an equidigital number, since it uses as much as digits as its factorization.

1223213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505769.

The product of its digits is 216, while the sum is 19.

The square root of 1223213311 is about 34974.4665577618. The cubic root of 1223213311 is about 1069.4670274900.

Adding to 1223213311 its reverse (1133123221), we get a palindrome (2356336532).

The spelling of 1223213311 in words is "one billion, two hundred twenty-three million, two hundred thirteen thousand, three hundred eleven".