11321421505000 has 320 divisors, whose sum is σ = 28364042163600. Its totient is φ = 4226826240000.

The previous prime is 11321421504997. The next prime is 11321421505001. The reversal of 11321421505000 is 50512412311.

It can be written as a sum of positive squares in 40 ways, for example, as 9334894753636 + 1986526751364 = 3055306^2 + 1409442^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (11321421505001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 842298280 + ... + 842311720.

Almost surely, 2^{11321421505000} is an apocalyptic number.

11321421505000 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 11321421505000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14182021081800).

11321421505000 is an abundant number, since it is smaller than the sum of its proper divisors (17042620658600).

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

11321421505000 is a wasteful number, since it uses less digits than its factorization.

11321421505000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13690 (or 13671 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 11321421505000 its reverse (50512412311), we get a palindrome (11371933917311).

The spelling of 11321421505000 in words is "eleven trillion, three hundred twenty-one billion, four hundred twenty-one million, five hundred five thousand".