1321340001500 has 96 divisors (see below), whose sum is σ = 2935678479552. Its totient is φ = 519417120000.

The previous prime is 1321340001431. The next prime is 1321340001503. The reversal of 1321340001500 is 51000431231.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321340001503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36002159 + ... + 36038841.

It is an arithmetic number, because the mean of its divisors is an integer number (30579984162).

Almost surely, 2^{1321340001500} is an apocalyptic number.

1321340001500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321340001500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1467839239776).

1321340001500 is an abundant number, since it is smaller than the sum of its proper divisors (1614338478052).

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

1321340001500 is a wasteful number, since it uses less digits than its factorization.

1321340001500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37944 (or 37932 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 1321340001500 its reverse (51000431231), we get a palindrome (1372340432731).

The spelling of 1321340001500 in words is "one trillion, three hundred twenty-one billion, three hundred forty million, one thousand, five hundred".