13211142166 has 4 divisors (see below), whose sum is σ = 19816713252. Its totient is φ = 6605571082.

The previous prime is 13211142137. The next prime is 13211142169. The reversal of 13211142166 is 66124111231.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211142169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3302785540 + ... + 3302785543.

It is an arithmetic number, because the mean of its divisors is an integer number (4954178313).

Almost surely, 2^13211142166 is an apocalyptic number.

13211142166 is a deficient number, since it is larger than the sum of its proper divisors (6605571086).

13211142166 is an equidigital number, since it uses as much as digits as its factorization.

13211142166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6605571085.

The product of its digits is 1728, while the sum is 28.

Adding to 13211142166 its reverse (66124111231), we get a palindrome (79335253397).

The spelling of 13211142166 in words is "thirteen billion, two hundred eleven million, one hundred forty-two thousand, one hundred sixty-six".