13121202166 has 32 divisors (see below), whose sum is σ = 20434452480. Its totient is φ = 6312297600.

The previous prime is 13121202151. The next prime is 13121202169. The reversal of 13121202166 is 66120212131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13121202166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121202169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10258315 + ... + 10259593.

It is an arithmetic number, because the mean of its divisors is an integer number (638576640).

Almost surely, 2^13121202166 is an apocalyptic number.

13121202166 is a deficient number, since it is larger than the sum of its proper divisors (7313250314).

13121202166 is a wasteful number, since it uses less digits than its factorization.

13121202166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140.

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

Adding to 13121202166 its reverse (66120212131), we get a palindrome (79241414297).

The spelling of 13121202166 in words is "thirteen billion, one hundred twenty-one million, two hundred two thousand, one hundred sixty-six".