210122112 has 128 divisors (see below), whose sum is σ = 599074560. Its totient is φ = 65083392.

The previous prime is 210122071. The next prime is 210122119. The reversal of 210122112 is 211221012.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326463 + ... + 327105.

It is an arithmetic number, because the mean of its divisors is an integer number (4680270).

Almost surely, 2^210122112 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 210122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299537280).

210122112 is an abundant number, since it is smaller than the sum of its proper divisors (388952448).

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

210122112 is a wasteful number, since it uses less digits than its factorization.

210122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 210122112 is about 14495.5893981583. The cubic root of 210122112 is about 594.5073831426.

Adding to 210122112 its reverse (211221012), we get a palindrome (421343124).

It can be divided in two parts, 21012 and 2112, that multiplied together give a palindrome (44377344).

The spelling of 210122112 in words is "two hundred ten million, one hundred twenty-two thousand, one hundred twelve".