1231420012 has 18 divisors (see below), whose sum is σ = 2168474028. Its totient is φ = 611879832.

The previous prime is 1231420009. The next prime is 1231420027. The reversal of 1231420012 is 2100241321.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 100483 + ... + 112069.

Almost surely, 2^1231420012 is an apocalyptic number.

It is an amenable number.

1231420012 is a deficient number, since it is larger than the sum of its proper divisors (937054016).

1231420012 is a wasteful number, since it uses less digits than its factorization.

1231420012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11917 (or 11752 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1231420012 is about 35091.5946061161. The cubic root of 1231420012 is about 1071.8534307576.

Adding to 1231420012 its reverse (2100241321), we get a palindrome (3331661333).

The spelling of 1231420012 in words is "one billion, two hundred thirty-one million, four hundred twenty thousand, twelve".