1211440012 has 12 divisors (see below), whose sum is σ = 2123460360. Its totient is φ = 604737056.

The previous prime is 1211440007. The next prime is 1211440049. The reversal of 1211440012 is 2100441121.

It is a happy number.

It is a super-3 number, since 3×1211440012³ (a number of 28 digits) contains 333 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 242962 + ... + 247897.

It is an arithmetic number, because the mean of its divisors is an integer number (176955030).

Almost surely, 2^1211440012 is an apocalyptic number.

It is an amenable number.

1211440012 is a deficient number, since it is larger than the sum of its proper divisors (912020348).

1211440012 is a wasteful number, since it uses less digits than its factorization.

1211440012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491480 (or 491478 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1211440012 is about 34805.7468243392. The cubic root of 1211440012 is about 1066.0247909501.

Adding to 1211440012 its reverse (2100441121), we get a palindrome (3311881133).

The spelling of 1211440012 in words is "one billion, two hundred eleven million, four hundred forty thousand, twelve".