13321240421234 has 4 divisors (see below), whose sum is σ = 19981860631854. Its totient is φ = 6660620210616.

The previous prime is 13321240421231. The next prime is 13321240421273. The reversal of 13321240421234 is 43212404212331.

It is a happy number.

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., 10583655082009 + 2737585339225 = 3253253^2 + 1654565^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13321240421234.

It is not an unprimeable number, because it can be changed into a prime (13321240421231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330310105307 + ... + 3330310105310.

Almost surely, 2^{13321240421234} is an apocalyptic number.

13321240421234 is a deficient number, since it is larger than the sum of its proper divisors (6660620210620).

13321240421234 is an equidigital number, since it uses as much as digits as its factorization.

13321240421234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660620210619.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 13321240421234 its reverse (43212404212331), we get a palindrome (56533644633565).

The spelling of 13321240421234 in words is "thirteen trillion, three hundred twenty-one billion, two hundred forty million, four hundred twenty-one thousand, two hundred thirty-four".