12865110061 has 2 divisors, whose sum is σ = 12865110062. Its totient is φ = 12865110060.

The previous prime is 12865110047. The next prime is 12865110107. The reversal of 12865110061 is 16001156821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7650825961 + 5214284100 = 87469^2 + 72210^2 .

It is a cyclic number.

It is not a de Polignac number, because 12865110061 - 2¹³ = 12865101869 is a prime.

It is a super-2 number, since 2×12865110061² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12865110001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6432555030 + 6432555031.

It is an arithmetic number, because the mean of its divisors is an integer number (6432555031).

Almost surely, 2^12865110061 is an apocalyptic number.

It is an amenable number.

12865110061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12865110061 is an equidigital number, since it uses as much as digits as its factorization.

12865110061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 31.

Adding to 12865110061 its reverse (16001156821), we get a palindrome (28866266882).

The spelling of 12865110061 in words is "twelve billion, eight hundred sixty-five million, one hundred ten thousand, sixty-one".