212501212 has 96 divisors (see below), whose sum is σ = 493355520. Its totient is φ = 77656320.

The previous prime is 212501203. The next prime is 212501213. The reversal of 212501212 is 212105212.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212501213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330163 + ... + 330805.

It is an arithmetic number, because the mean of its divisors is an integer number (5139120).

Almost surely, 2^212501212 is an apocalyptic number.

212501212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212501212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246677760).

212501212 is an abundant number, since it is smaller than the sum of its proper divisors (280854308).

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

212501212 is a wasteful number, since it uses less digits than its factorization.

212501212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 212501212 is about 14577.4213083110. The cubic root of 212501212 is about 596.7427304726.

Adding to 212501212 its reverse (212105212), we get a palindrome (424606424).

The spelling of 212501212 in words is "two hundred twelve million, five hundred one thousand, two hundred twelve".