1223213212 has 18 divisors (see below), whose sum is σ = 2317954128. Its totient is φ = 564559632.

The previous prime is 1223213153. The next prime is 1223213227. The reversal of 1223213212 is 2123123221.

It is a super-2 number, since 2×1223213212² = 2992501124022713888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1223213212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 904068 + ... + 905419.

Almost surely, 2^1223213212 is an apocalyptic number.

It is an amenable number.

1223213212 is a deficient number, since it is larger than the sum of its proper divisors (1094740916).

1223213212 is a wasteful number, since it uses less digits than its factorization.

1223213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809517 (or 1809502 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 1223213212 is about 34974.4651424436. The cubic root of 1223213212 is about 1069.4669986377.

Adding to 1223213212 its reverse (2123123221), we get a palindrome (3346336433).

The spelling of 1223213212 in words is "one billion, two hundred twenty-three million, two hundred thirteen thousand, two hundred twelve".