212323100 has 72 divisors (see below), whose sum is σ = 529132800. Its totient is φ = 73137600.

The previous prime is 212323093. The next prime is 212323103. The reversal of 212323100 is 1323212.

It is a happy number.

It is a super-2 number, since 2×212323100² = 90162197587220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212323103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15821 + ... + 25979.

Almost surely, 2^212323100 is an apocalyptic number.

212323100 is a gapful number since it is divisible by the number (20) 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 212323100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264566400).

212323100 is an abundant number, since it is smaller than the sum of its proper divisors (316809700).

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

212323100 is a wasteful number, since it uses less digits than its factorization.

212323100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203 (or 10196 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 212323100 is about 14571.3108538662. The cubic root of 212323100 is about 596.5759600503.

Adding to 212323100 its reverse (1323212), we get a palindrome (213646312).

The spelling of 212323100 in words is "two hundred twelve million, three hundred twenty-three thousand, one hundred".