212302332221 has 16 divisors (see below), whose sum is σ = 255788966400. Its totient is φ = 172134205488.

The previous prime is 212302332197. The next prime is 212302332223. The reversal of 212302332221 is 122233203212.

It is not a de Polignac number, because 212302332221 - 2⁶ = 212302332157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212302332223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1123475 + ... + 1298768.

It is an arithmetic number, because the mean of its divisors is an integer number (15986810400).

Almost surely, 2^212302332221 is an apocalyptic number.

It is an amenable number.

212302332221 is a deficient number, since it is larger than the sum of its proper divisors (43486634179).

212302332221 is a wasteful number, since it uses less digits than its factorization.

212302332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422928.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 212302332221 its reverse (122233203212), we get a palindrome (334535535433).

The spelling of 212302332221 in words is "two hundred twelve billion, three hundred two million, three hundred thirty-two thousand, two hundred twenty-one".