1212144213 has 24 divisors (see below), whose sum is σ = 1925925120. Its totient is φ = 675756480.

The previous prime is 1212144191. The next prime is 1212144239. The reversal of 1212144213 is 3124412121.

It is not a de Polignac number, because 1212144213 - 2⁹ = 1212143701 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 1212144213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212144253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94533 + ... + 106586.

It is an arithmetic number, because the mean of its divisors is an integer number (80246880).

Almost surely, 2^1212144213 is an apocalyptic number.

It is an amenable number.

1212144213 is a deficient number, since it is larger than the sum of its proper divisors (713780907).

1212144213 is a wasteful number, since it uses less digits than its factorization.

1212144213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201177 (or 201170 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 1212144213 is about 34815.8615145453. The cubic root of 1212144213 is about 1066.2313083468.

Adding to 1212144213 its reverse (3124412121), we get a palindrome (4336556334).

The spelling of 1212144213 in words is "one billion, two hundred twelve million, one hundred forty-four thousand, two hundred thirteen".