13012121166 has 16 divisors (see below), whose sum is σ = 28390082688. Its totient is φ = 3943067000.

The previous prime is 13012121123. The next prime is 13012121173. The reversal of 13012121166 is 66112121031.

It is a happy number.

13012121166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 98576610 + ... + 98576741.

It is an arithmetic number, because the mean of its divisors is an integer number (1774380168).

Almost surely, 2^13012121166 is an apocalyptic number.

13012121166 is an abundant number, since it is smaller than the sum of its proper divisors (15377961522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13012121166 is a wasteful number, since it uses less digits than its factorization.

13012121166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197153367.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 13012121166 its reverse (66112121031), we get a palindrome (79124242197).

The spelling of 13012121166 in words is "thirteen billion, twelve million, one hundred twenty-one thousand, one hundred sixty-six".