12542217501250 has 20 divisors (see below), whose sum is σ = 23509132486686. Its totient is φ = 5016887000000.

The previous prime is 12542217501221. The next prime is 12542217501257. The reversal of 12542217501250 is 5210571224521.

It can be written as a sum of positive squares in 5 ways, for example, as 592689038769 + 11949528462481 = 769863^2 + 3456809^2 .

It is not an unprimeable number, because it can be changed into a prime (12542217501257) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5016885751 + ... + 5016888250.

Almost surely, 2^{12542217501250} is an apocalyptic number.

12542217501250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12542217501250 is a deficient number, since it is larger than the sum of its proper divisors (10966914985436).

12542217501250 is an equidigital number, since it uses as much as digits as its factorization.

12542217501250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10033774023 (or 10033774008 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 37.

Adding to 12542217501250 its reverse (5210571224521), we get a palindrome (17752788725771).

The spelling of 12542217501250 in words is "twelve trillion, five hundred forty-two billion, two hundred seventeen million, five hundred one thousand, two hundred fifty".