12135054553961 has 2 divisors, whose sum is σ = 12135054553962. Its totient is φ = 12135054553960.

The previous prime is 12135054553913. The next prime is 12135054554009. The reversal of 12135054553961 is 16935545053121.

It is a balanced prime because it is at equal distance from previous prime (12135054553913) and next prime (12135054554009).

It can be written as a sum of positive squares in only one way, i.e., 12044064847936 + 90989706025 = 3470456^2 + 301645^2 .

It is an emirp because it is prime and its reverse (16935545053121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12135054553961 is a prime.

It is not a weakly prime, because it can be changed into another prime (12135054553561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6067527276980 + 6067527276981.

It is an arithmetic number, because the mean of its divisors is an integer number (6067527276981).

Almost surely, 2^{12135054553961} is an apocalyptic number.

It is an amenable number.

12135054553961 is a deficient number, since it is larger than the sum of its proper divisors (1).

12135054553961 is an equidigital number, since it uses as much as digits as its factorization.

12135054553961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430000, while the sum is 50.

The spelling of 12135054553961 in words is "twelve trillion, one hundred thirty-five billion, fifty-four million, five hundred fifty-three thousand, nine hundred sixty-one".