12522166621 has 16 divisors (see below), whose sum is σ = 13591992960. Its totient is φ = 11500695360.

The previous prime is 12522166609. The next prime is 12522166627. The reversal of 12522166621 is 12666122521.

12522166621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12522166621 - 2⁹ = 12522166109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12522166627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68866 + ... + 172588.

It is an arithmetic number, because the mean of its divisors is an integer number (849499560).

Almost surely, 2^12522166621 is an apocalyptic number.

It is an amenable number.

12522166621 is a deficient number, since it is larger than the sum of its proper divisors (1069826339).

12522166621 is a wasteful number, since it uses less digits than its factorization.

12522166621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103956.

The product of its digits is 17280, while the sum is 34.

The spelling of 12522166621 in words is "twelve billion, five hundred twenty-two million, one hundred sixty-six thousand, six hundred twenty-one".