210111120012 has 12 divisors (see below), whose sum is σ = 490259280056. Its totient is φ = 70037040000.

The previous prime is 210111119987. The next prime is 210111120013. The reversal of 210111120012 is 210021111012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 17509260001 = 210111120012 / (2 + 1 + 0 + 1 + 1 + 1 + 1 + 2 + 0 + 0 + 1 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 210111120012.

It is not an unprimeable number, because it can be changed into a prime (210111120013) 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, 8754629989 + ... + 8754630012.

Almost surely, 2^210111120012 is an apocalyptic number.

It is an amenable number.

210111120012 is an abundant number, since it is smaller than the sum of its proper divisors (280148160044).

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

210111120012 is a wasteful number, since it uses less digits than its factorization.

210111120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17509260008 (or 17509260006 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210111120012 its reverse (210021111012), we get a palindrome (420132231024).

The spelling of 210111120012 in words is "two hundred ten billion, one hundred eleven million, one hundred twenty thousand, twelve".