212011321 has 4 divisors (see below), whose sum is σ = 212058000. Its totient is φ = 211964644.

The previous prime is 212011307. The next prime is 212011333. The reversal of 212011321 is 123110212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212011321 - 2⁷ = 212011193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212011381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15691 + ... + 25888.

It is an arithmetic number, because the mean of its divisors is an integer number (53014500).

Almost surely, 2^212011321 is an apocalyptic number.

It is an amenable number.

212011321 is a deficient number, since it is larger than the sum of its proper divisors (46679).

212011321 is an equidigital number, since it uses as much as digits as its factorization.

212011321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46678.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 212011321 is about 14560.6085381072. The cubic root of 212011321 is about 596.2838094358.

Adding to 212011321 its reverse (123110212), we get a palindrome (335121533).

It can be divided in two parts, 21201 and 1321, that added together give a palindrome (22522).

The spelling of 212011321 in words is "two hundred twelve million, eleven thousand, three hundred twenty-one".