12245121440 has 24 divisors (see below), whose sum is σ = 28929099780. Its totient is φ = 4898048512.

The previous prime is 12245121419. The next prime is 12245121467. The reversal of 12245121440 is 4412154221.

It can be written as a sum of positive squares in 2 ways, for example, as 11473837456 + 771283984 = 107116^2 + 27772^2 .

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 3 ways as a sum of consecutive naturals, for example, 38265845 + ... + 38266164.

Almost surely, 2^12245121440 is an apocalyptic number.

12245121440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12245121440 is an abundant number, since it is smaller than the sum of its proper divisors (16683978340).

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

12245121440 is an equidigital number, since it uses as much as digits as its factorization.

12245121440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76532024 (or 76532016 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 12245121440 its reverse (4412154221), we get a palindrome (16657275661).

The spelling of 12245121440 in words is "twelve billion, two hundred forty-five million, one hundred twenty-one thousand, four hundred forty".