12671222085 has 48 divisors (see below), whose sum is σ = 23352254640. Its totient is φ = 6333972480.

The previous prime is 12671222063. The next prime is 12671222087. The reversal of 12671222085 is 58022217621.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 910470276 + 11760751809 = 30174^2 + 108447^2 .

It is not a de Polignac number, because 12671222085 - 2¹⁶ = 12671156549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12671222087) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 150001 + ... + 218729.

It is an arithmetic number, because the mean of its divisors is an integer number (486505305).

Almost surely, 2^12671222085 is an apocalyptic number.

12671222085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12671222085 is a deficient number, since it is larger than the sum of its proper divisors (10681032555).

12671222085 is a wasteful number, since it uses less digits than its factorization.

12671222085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68998 (or 68995 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 12671222085 in words is "twelve billion, six hundred seventy-one million, two hundred twenty-two thousand, eighty-five".