12131201234 has 4 divisors (see below), whose sum is σ = 18196801854. Its totient is φ = 6065600616.

The previous prime is 12131201183. The next prime is 12131201249. The reversal of 12131201234 is 43210213121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6407522209 + 5723679025 = 80047^2 + 75655^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3032800307 + ... + 3032800310.

Almost surely, 2^12131201234 is an apocalyptic number.

12131201234 is a deficient number, since it is larger than the sum of its proper divisors (6065600620).

12131201234 is an equidigital number, since it uses as much as digits as its factorization.

12131201234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6065600619.

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

Adding to 12131201234 its reverse (43210213121), we get a palindrome (55341414355).

The spelling of 12131201234 in words is "twelve billion, one hundred thirty-one million, two hundred one thousand, two hundred thirty-four".