12171472450 has 24 divisors (see below), whose sum is σ = 22801821840. Its totient is φ = 4833560400.

The previous prime is 12171472403. The next prime is 12171472493. The reversal of 12171472450 is 5427417121.

It is a super-2 number, since 2×12171472450² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 868696 + ... + 882595.

It is an arithmetic number, because the mean of its divisors is an integer number (950075910).

Almost surely, 2^12171472450 is an apocalyptic number.

12171472450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12171472450 is a deficient number, since it is larger than the sum of its proper divisors (10630349390).

12171472450 is a wasteful number, since it uses less digits than its factorization.

12171472450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751442 (or 1751437 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

Adding to 12171472450 its reverse (5427417121), we get a palindrome (17598889571).

The spelling of 12171472450 in words is "twelve billion, one hundred seventy-one million, four hundred seventy-two thousand, four hundred fifty".