12261064356511 has 16 divisors (see below), whose sum is σ = 12586667258880. Its totient is φ = 11938169809440.

The previous prime is 12261064356487. The next prime is 12261064356599. The reversal of 12261064356511 is 11565346016221.

It is a cyclic number.

It is not a de Polignac number, because 12261064356511 - 2⁹ = 12261064355999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261064356011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110673016 + ... + 110783746.

It is an arithmetic number, because the mean of its divisors is an integer number (786666703680).

Almost surely, 2^{12261064356511} is an apocalyptic number.

12261064356511 is a deficient number, since it is larger than the sum of its proper divisors (325602902369).

12261064356511 is a wasteful number, since it uses less digits than its factorization.

12261064356511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122934.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 12261064356511 in words is "twelve trillion, two hundred sixty-one billion, sixty-four million, three hundred fifty-six thousand, five hundred eleven".