210120012112 has 20 divisors (see below), whose sum is σ = 409460751540. Its totient is φ = 104452721408.

The previous prime is 210120012107. The next prime is 210120012119. The reversal of 210120012112 is 211210021012.

It can be written as a sum of positive squares in 2 ways, for example, as 140538013456 + 69581998656 = 374884^2 + 263784^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210120012092 and 210120012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120012119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37952437 + ... + 37957972.

It is an arithmetic number, because the mean of its divisors is an integer number (20473037577).

Almost surely, 2^210120012112 is an apocalyptic number.

It is an amenable number.

210120012112 is a deficient number, since it is larger than the sum of its proper divisors (199340739428).

210120012112 is a wasteful number, since it uses less digits than its factorization.

210120012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75910590 (or 75910584 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210120012112 its reverse (211210021012), we get a palindrome (421330033124).

The spelling of 210120012112 in words is "two hundred ten billion, one hundred twenty million, twelve thousand, one hundred twelve".