11421043520 has 28 divisors (see below), whose sum is σ = 27196360644. Its totient is φ = 4568417280.

The previous prime is 11421043519. The next prime is 11421043537. The reversal of 11421043520 is 2534012411.

It can be written as a sum of positive squares in 2 ways, for example, as 3319603456 + 8101440064 = 57616^2 + 90008^2 .

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, 17845061 + ... + 17845700.

Almost surely, 2^11421043520 is an apocalyptic number.

11421043520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11421043520 is an abundant number, since it is smaller than the sum of its proper divisors (15775317124).

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

11421043520 is an equidigital number, since it uses as much as digits as its factorization.

11421043520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35690778 (or 35690768 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 11421043520 its reverse (2534012411), we get a palindrome (13955055931).

The spelling of 11421043520 in words is "eleven billion, four hundred twenty-one million, forty-three thousand, five hundred twenty".