12440421015 has 96 divisors (see below), whose sum is σ = 23106110976. Its totient is φ = 5663992320.

The previous prime is 12440421001. The next prime is 12440421047. The reversal of 12440421015 is 51012404421.

It is not a de Polignac number, because 12440421015 - 2⁵ = 12440420983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5133094 + ... + 5135516.

It is an arithmetic number, because the mean of its divisors is an integer number (240688656).

Almost surely, 2^12440421015 is an apocalyptic number.

12440421015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12440421015 is a deficient number, since it is larger than the sum of its proper divisors (10665689961).

12440421015 is a wasteful number, since it uses less digits than its factorization.

12440421015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2508 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 12440421015 its reverse (51012404421), we get a palindrome (63452825436).

The spelling of 12440421015 in words is "twelve billion, four hundred forty million, four hundred twenty-one thousand, fifteen".