12102105544 has 8 divisors (see below), whose sum is σ = 22691447910. Its totient is φ = 6051052768.

The previous prime is 12102105539. The next prime is 12102105559. The reversal of 12102105544 is 44550120121.

It can be written as a sum of positive squares in only one way, i.e., 7231461444 + 4870644100 = 85038^2 + 69790^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756381589 + ... + 756381604.

Almost surely, 2^12102105544 is an apocalyptic number.

It is an amenable number.

12102105544 is a deficient number, since it is larger than the sum of its proper divisors (10589342366).

12102105544 is a wasteful number, since it uses less digits than its factorization.

12102105544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512763199 (or 1512763195 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 12102105544 its reverse (44550120121), we get a palindrome (56652225665).

The spelling of 12102105544 in words is "twelve billion, one hundred two million, one hundred five thousand, five hundred forty-four".