212211324 has 72 divisors (see below), whose sum is σ = 579415200. Its totient is φ = 65100672.

The previous prime is 212211277. The next prime is 212211331. The reversal of 212211324 is 423112212.

It is a happy number.

212211324 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 212211297 and 212211306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279954 + ... + 280710.

Almost surely, 2^212211324 is an apocalyptic number.

212211324 is the 7787-th nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212211324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289707600).

212211324 is an abundant number, since it is smaller than the sum of its proper divisors (367203876).

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

212211324 is a wasteful number, since it uses less digits than its factorization.

212211324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379 (or 1374 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 212211324 is about 14567.4748669768. The cubic root of 212211324 is about 596.4712539373.

Adding to 212211324 its reverse (423112212), we get a palindrome (635323536).

The spelling of 212211324 in words is "two hundred twelve million, two hundred eleven thousand, three hundred twenty-four".