210121112 has 24 divisors (see below), whose sum is σ = 400013460. Its totient is φ = 103474800.

The previous prime is 210121103. The next prime is 210121151. The reversal of 210121112 is 211121012.

It is a junction number, because it is equal to n+sod(n) for n = 210121093 and 210121102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32987 + ... + 38837.

Almost surely, 2^210121112 is an apocalyptic number.

It is an amenable number.

210121112 is a deficient number, since it is larger than the sum of its proper divisors (189892348).

210121112 is an equidigital number, since it uses as much as digits as its factorization.

210121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5991 (or 5920 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 210121112 is about 14495.5549048665. The cubic root of 210121112 is about 594.5064400270.

Adding to 210121112 its reverse (211121012), we get a palindrome (421242124).

The spelling of 210121112 in words is "two hundred ten million, one hundred twenty-one thousand, one hundred twelve".