1231430012 has 12 divisors (see below), whose sum is σ = 2158307256. Its totient is φ = 614770800.

The previous prime is 1231430009. The next prime is 1231430017. The reversal of 1231430012 is 2100341321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231430017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233114 + ... + 238337.

It is an arithmetic number, because the mean of its divisors is an integer number (179858938).

Almost surely, 2^1231430012 is an apocalyptic number.

It is an amenable number.

1231430012 is a deficient number, since it is larger than the sum of its proper divisors (926877244).

1231430012 is a wasteful number, since it uses less digits than its factorization.

1231430012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472108 (or 472106 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1231430012 is about 35091.7370900900. The cubic root of 1231430012 is about 1071.8563321520.

Adding to 1231430012 its reverse (2100341321), we get a palindrome (3331771333).

The spelling of 1231430012 in words is "one billion, two hundred thirty-one million, four hundred thirty thousand, twelve".