11321420115780 has 192 divisors, whose sum is σ = 37103980032000. Its totient is φ = 2857989453696.

The previous prime is 11321420115767. The next prime is 11321420115781. The reversal of 11321420115780 is 8751102412311.

It is a happy number.

11321420115780 is a `hidden beast` number, since 1 + 1 + 3 + 2 + 1 + 420 + 1 + 157 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11321420115781) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13199251 + ... + 14030789.

It is an arithmetic number, because the mean of its divisors is an integer number (193249896000).

Almost surely, 2^{11321420115780} is an apocalyptic number.

11321420115780 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 11321420115780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18551990016000).

11321420115780 is an abundant number, since it is smaller than the sum of its proper divisors (25782559916220).

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

11321420115780 is a wasteful number, since it uses less digits than its factorization.

11321420115780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832903 (or 832895 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The spelling of 11321420115780 in words is "eleven trillion, three hundred twenty-one billion, four hundred twenty million, one hundred fifteen thousand, seven hundred eighty".