12540025221145 has 8 divisors (see below), whose sum is σ = 15397984457856. Its totient is φ = 9798717381936.

The previous prime is 12540025221131. The next prime is 12540025221179. The reversal of 12540025221145 is 54112252004521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12540025221145 - 2⁹ = 12540025220633 is a prime.

It is a super-2 number, since 2×12540025221145² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12540025221145.

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, 29162849137 + ... + 29162849566.

It is an arithmetic number, because the mean of its divisors is an integer number (1924748057232).

Almost surely, 2^{12540025221145} is an apocalyptic number.

It is an amenable number.

12540025221145 is a deficient number, since it is larger than the sum of its proper divisors (2857959236711).

12540025221145 is an equidigital number, since it uses as much as digits as its factorization.

12540025221145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58325698751.

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 12540025221145 its reverse (54112252004521), we get a palindrome (66652277225666).

The spelling of 12540025221145 in words is "twelve trillion, five hundred forty billion, twenty-five million, two hundred twenty-one thousand, one hundred forty-five".