212110122 has 144 divisors (see below), whose sum is σ = 554335488. Its totient is φ = 53706240.

The previous prime is 212110121. The next prime is 212110123. The reversal of 212110122 is 221011212.

It is an interprime number because it is at equal distance from previous prime (212110121) and next prime (212110123).

It is a junction number, because it is equal to n+sod(n) for n = 212110098 and 212110107.

It is not an unprimeable number, because it can be changed into a prime (212110121) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5732688 + ... + 5732724.

It is an arithmetic number, because the mean of its divisors is an integer number (3849552).

Almost surely, 2^212110122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212110122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277167744).

212110122 is an abundant number, since it is smaller than the sum of its proper divisors (342225366).

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

212110122 is a wasteful number, since it uses less digits than its factorization.

212110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 97 counting only the distinct ones).

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

The square root of 212110122 is about 14564.0008926119. Note that the first 3 decimals coincide. The cubic root of 212110122 is about 596.3764212945.

Adding to 212110122 its reverse (221011212), we get a palindrome (433121334).

The spelling of 212110122 in words is "two hundred twelve million, one hundred ten thousand, one hundred twenty-two".