1321233040342 has 4 divisors (see below), whose sum is σ = 1981849560516. Its totient is φ = 660616520170.

The previous prime is 1321233040333. The next prime is 1321233040357. The reversal of 1321233040342 is 2430403321231.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1321233040342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330308260084 + ... + 330308260087.

It is an arithmetic number, because the mean of its divisors is an integer number (495462390129).

Almost surely, 2^{1321233040342} is an apocalyptic number.

1321233040342 is a deficient number, since it is larger than the sum of its proper divisors (660616520174).

1321233040342 is an equidigital number, since it uses as much as digits as its factorization.

1321233040342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660616520173.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 1321233040342 its reverse (2430403321231), we get a palindrome (3751636361573).

The spelling of 1321233040342 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-three million, forty thousand, three hundred forty-two".