12601012066 has 4 divisors (see below), whose sum is σ = 18901518102. Its totient is φ = 6300506032.

The previous prime is 12601012043. The next prime is 12601012079. The reversal of 12601012066 is 66021010621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8783625841 + 3817386225 = 93721^2 + 61785^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12601012066.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3150253015 + ... + 3150253018.

Almost surely, 2^12601012066 is an apocalyptic number.

12601012066 is a deficient number, since it is larger than the sum of its proper divisors (6300506036).

12601012066 is an equidigital number, since it uses as much as digits as its factorization.

12601012066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6300506035.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 12601012066 its reverse (66021010621), we get a palindrome (78622022687).

The spelling of 12601012066 in words is "twelve billion, six hundred one million, twelve thousand, sixty-six".