1123421212 has 6 divisors (see below), whose sum is σ = 1965987128. Its totient is φ = 561710604.

The previous prime is 1123421209. The next prime is 1123421263. The reversal of 1123421212 is 2121243211.

It is a self number, because there is not a number n which added to its sum of digits gives 1123421212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140427648 + ... + 140427655.

Almost surely, 2^1123421212 is an apocalyptic number.

It is an amenable number.

1123421212 is a deficient number, since it is larger than the sum of its proper divisors (842565916).

1123421212 is a wasteful number, since it uses less digits than its factorization.

1123421212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280855307 (or 280855305 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 1123421212 is about 33517.4762176391. The cubic root of 1123421212 is about 1039.5551635553. Note that the first 3 decimals are identical.

Adding to 1123421212 its reverse (2121243211), we get a palindrome (3244664423).

The spelling of 1123421212 in words is "one billion, one hundred twenty-three million, four hundred twenty-one thousand, two hundred twelve".