1321601311344 has 20 divisors (see below), whose sum is σ = 3414136721096. Its totient is φ = 440533770432.

The previous prime is 1321601311301. The next prime is 1321601311361. The reversal of 1321601311344 is 4431131061231.

It is a super-2 number, since 2×1321601311344² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13766680279 + ... + 13766680374.

Almost surely, 2^{1321601311344} is an apocalyptic number.

It is an amenable number.

1321601311344 is an abundant number, since it is smaller than the sum of its proper divisors (2092535409752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321601311344 is a wasteful number, since it uses less digits than its factorization.

1321601311344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27533360664 (or 27533360658 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 1321601311344 its reverse (4431131061231), we get a palindrome (5752732372575).

The spelling of 1321601311344 in words is "one trillion, three hundred twenty-one billion, six hundred one million, three hundred eleven thousand, three hundred forty-four".