21001440312324 has 72 divisors (see below), whose sum is σ = 53186000413728. Its totient is φ = 6987425558400.

The previous prime is 21001440312289. The next prime is 21001440312341. The reversal of 21001440312324 is 42321304410012.

21001440312324 is a `hidden beast` number, since 2 + 10 + 0 + 14 + 4 + 0 + 312 + 324 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136245504 + ... + 136399560.

Almost surely, 2^{21001440312324} is an apocalyptic number.

It is an amenable number.

21001440312324 is an abundant number, since it is smaller than the sum of its proper divisors (32184560101404).

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

21001440312324 is a wasteful number, since it uses less digits than its factorization.

21001440312324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161105 (or 161100 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21001440312324 its reverse (42321304410012), we get a palindrome (63322744722336).

The spelling of 21001440312324 in words is "twenty-one trillion, one billion, four hundred forty million, three hundred twelve thousand, three hundred twenty-four".