1223213313 has 24 divisors (see below), whose sum is σ = 1900283328. Its totient is φ = 697853856.

The previous prime is 1223213279. The next prime is 1223213333. The reversal of 1223213313 is 3133123221.

It is not a de Polignac number, because 1223213313 - 2⁹ = 1223212801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1223213313.

It is not an unprimeable number, because it can be changed into a prime (1223213333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89620 + ... + 102362.

It is an arithmetic number, because the mean of its divisors is an integer number (79178472).

Almost surely, 2^1223213313 is an apocalyptic number.

It is an amenable number.

1223213313 is a deficient number, since it is larger than the sum of its proper divisors (677070015).

1223213313 is a wasteful number, since it uses less digits than its factorization.

1223213313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13413 (or 13406 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 1223213313 is about 34974.4665863541. The cubic root of 1223213313 is about 1069.4670280728.

Adding to 1223213313 its reverse (3133123221), we get a palindrome (4356336534).

The spelling of 1223213313 in words is "one billion, two hundred twenty-three million, two hundred thirteen thousand, three hundred thirteen".