12540305222402 has 16 divisors (see below), whose sum is σ = 18983926395000. Its totient is φ = 6212539641600.

The previous prime is 12540305222387. The next prime is 12540305222453. The reversal of 12540305222402 is 20422250304521.

It can be written as a sum of positive squares in 4 ways, for example, as 12388985000401 + 151320222001 = 3519799^2 + 388999^2 .

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 7 ways as a sum of consecutive naturals, for example, 52351277 + ... + 52590272.

Almost surely, 2^{12540305222402} is an apocalyptic number.

12540305222402 is a deficient number, since it is larger than the sum of its proper divisors (6443621172598).

12540305222402 is a wasteful number, since it uses less digits than its factorization.

12540305222402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104942101.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 12540305222402 its reverse (20422250304521), we get a palindrome (32962555526923).

The spelling of 12540305222402 in words is "twelve trillion, five hundred forty billion, three hundred five million, two hundred twenty-two thousand, four hundred two".