210120012 has 72 divisors (see below), whose sum is σ = 561615600. Its totient is φ = 66054528.

The previous prime is 210119989. The next prime is 210120041. The reversal of 210120012 is 210021012.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 210119976 and 210120003.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188914 + ... + 190022.

Almost surely, 2^210120012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210120012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280807800).

210120012 is an abundant number, since it is smaller than the sum of its proper divisors (351495588).

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

210120012 is a wasteful number, since it uses less digits than its factorization.

210120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415 (or 1410 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 210120012 is about 14495.5169621507. The cubic root of 210120012 is about 594.5054025964.

Adding to 210120012 its reverse (210021012), we get a palindrome (420141024).

The spelling of 210120012 in words is "two hundred ten million, one hundred twenty thousand, twelve".