1211243212 has 6 divisors (see below), whose sum is σ = 2119675628. Its totient is φ = 605621604.

The previous prime is 1211243123. The next prime is 1211243213. The reversal of 1211243212 is 2123421121.

It is a super-2 number, since 2×1211243212² = 2934220237232153888, 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 1211243212.

It is not an unprimeable number, because it can be changed into a prime (1211243213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151405398 + ... + 151405405.

Almost surely, 2^1211243212 is an apocalyptic number.

It is an amenable number.

1211243212 is a deficient number, since it is larger than the sum of its proper divisors (908432416).

1211243212 is a wasteful number, since it uses less digits than its factorization.

1211243212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302810807 (or 302810805 counting only the distinct ones).

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

The square root of 1211243212 is about 34802.9195901723. The cubic root of 1211243212 is about 1065.9670621209.

Adding to 1211243212 its reverse (2123421121), we get a palindrome (3334664333).

The spelling of 1211243212 in words is "one billion, two hundred eleven million, two hundred forty-three thousand, two hundred twelve".