1212231213 has 24 divisors (see below), whose sum is σ = 1772388800. Its totient is φ = 798315264.

The previous prime is 1212231203. The next prime is 1212231227. The reversal of 1212231213 is 3121322121.

It is not a de Polignac number, because 1212231213 - 2⁶ = 1212231149 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 (1212231203) 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, 644208 + ... + 646086.

Almost surely, 2^1212231213 is an apocalyptic number.

It is an amenable number.

1212231213 is a deficient number, since it is larger than the sum of its proper divisors (560157587).

1212231213 is a wasteful number, since it uses less digits than its factorization.

1212231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721 (or 2718 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1212231213 is about 34817.1109226484. The cubic root of 1212231213 is about 1066.2568168365.

Adding to 1212231213 its reverse (3121322121), we get a palindrome (4333553334).

The spelling of 1212231213 in words is "one billion, two hundred twelve million, two hundred thirty-one thousand, two hundred thirteen".