12101166556 has 6 divisors (see below), whose sum is σ = 21177041480. Its totient is φ = 6050583276.

The previous prime is 12101166533. The next prime is 12101166599. The reversal of 12101166556 is 65566110121.

It is a super-2 number, since 2×12101166556² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1512645816 + ... + 1512645823.

Almost surely, 2^12101166556 is an apocalyptic number.

It is an amenable number.

12101166556 is a deficient number, since it is larger than the sum of its proper divisors (9075874924).

12101166556 is a wasteful number, since it uses less digits than its factorization.

12101166556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025291643 (or 3025291641 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

Adding to 12101166556 its reverse (65566110121), we get a palindrome (77667276677).

The spelling of 12101166556 in words is "twelve billion, one hundred one million, one hundred sixty-six thousand, five hundred fifty-six".