12287478751181 has 2 divisors, whose sum is σ = 12287478751182. Its totient is φ = 12287478751180.

The previous prime is 12287478751151. The next prime is 12287478751237. The reversal of 12287478751181 is 18115787478221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9869870473225 + 2417608277956 = 3141635^2 + 1554866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12287478751181 is a prime.

It is a super-2 number, since 2×12287478751181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12287478751151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6143739375590 + 6143739375591.

It is an arithmetic number, because the mean of its divisors is an integer number (6143739375591).

Almost surely, 2^{12287478751181} is an apocalyptic number.

It is an amenable number.

12287478751181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12287478751181 is an equidigital number, since it uses as much as digits as its factorization.

12287478751181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14049280, while the sum is 62.

The spelling of 12287478751181 in words is "twelve trillion, two hundred eighty-seven billion, four hundred seventy-eight million, seven hundred fifty-one thousand, one hundred eighty-one".