12101210101172 has 12 divisors (see below), whose sum is σ = 21198487126656. Its totient is φ = 6044499493560.

The previous prime is 12101210101171. The next prime is 12101210101217. The reversal of 12101210101172 is 27110101210121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101210101171) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1526384798 + ... + 1526392725.

It is an arithmetic number, because the mean of its divisors is an integer number (1766540593888).

Almost surely, 2^{12101210101172} is an apocalyptic number.

It is an amenable number.

12101210101172 is a deficient number, since it is larger than the sum of its proper divisors (9097277025484).

12101210101172 is a wasteful number, since it uses less digits than its factorization.

12101210101172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052778518 (or 3052778516 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 12101210101172 its reverse (27110101210121), we get a palindrome (39211311311293).

The spelling of 12101210101172 in words is "twelve trillion, one hundred one billion, two hundred ten million, one hundred one thousand, one hundred seventy-two".