12402220324 has 24 divisors (see below), whose sum is σ = 24748323768. Its totient is φ = 5387389440.

The previous prime is 12402220231. The next prime is 12402220367. The reversal of 12402220324 is 42302220421.

It can be written as a sum of positive squares in 4 ways, for example, as 1749916224 + 10652304100 = 41832^2 + 103210^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12402220295 and 12402220304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7013947 + ... + 7015714.

It is an arithmetic number, because the mean of its divisors is an integer number (1031180157).

Almost surely, 2^12402220324 is an apocalyptic number.

It is an amenable number.

12402220324 is a deficient number, since it is larger than the sum of its proper divisors (12346103444).

12402220324 is a wasteful number, since it uses less digits than its factorization.

12402220324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14029695 (or 14029693 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 12402220324 its reverse (42302220421), we get a palindrome (54704440745).

The spelling of 12402220324 in words is "twelve billion, four hundred two million, two hundred twenty thousand, three hundred twenty-four".