1211430320012 has 12 divisors (see below), whose sum is σ = 2312730611016. Its totient is φ = 550650145440.

The previous prime is 1211430319949. The next prime is 1211430320033. The reversal of 1211430320012 is 2100230341121.

It is a super-3 number, since 3×1211430320012³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13766253593 + ... + 13766253680.

It is an arithmetic number, because the mean of its divisors is an integer number (192727550918).

Almost surely, 2^{1211430320012} is an apocalyptic number.

It is an amenable number.

1211430320012 is a deficient number, since it is larger than the sum of its proper divisors (1101300291004).

1211430320012 is a wasteful number, since it uses less digits than its factorization.

1211430320012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27532507288 (or 27532507286 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1211430320012 its reverse (2100230341121), we get a palindrome (3311660661133).

The spelling of 1211430320012 in words is "one trillion, two hundred eleven billion, four hundred thirty million, three hundred twenty thousand, twelve".