12261501253611 has 48 divisors (see below), whose sum is σ = 18757880294400. Its totient is φ = 7702608513600.

The previous prime is 12261501253559. The next prime is 12261501253627. The reversal of 12261501253611 is 11635210516221.

12261501253611 is a `hidden beast` number, since 1 + 2 + 2 + 6 + 15 + 0 + 1 + 25 + 3 + 611 = 666.

It is not a de Polignac number, because 12261501253611 - 2²⁵ = 12261467699179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12261501253681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2686930 + ... + 5634056.

It is an arithmetic number, because the mean of its divisors is an integer number (390789172800).

Almost surely, 2^{12261501253611} is an apocalyptic number.

12261501253611 is a deficient number, since it is larger than the sum of its proper divisors (6496379040789).

12261501253611 is a wasteful number, since it uses less digits than its factorization.

12261501253611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947456 (or 2947453 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

Adding to 12261501253611 its reverse (11635210516221), we get a palindrome (23896711769832).

The spelling of 12261501253611 in words is "twelve trillion, two hundred sixty-one billion, five hundred one million, two hundred fifty-three thousand, six hundred eleven".