212201332421 has 4 divisors (see below), whose sum is σ = 228524511852. Its totient is φ = 195878152992.

The previous prime is 212201332403. The next prime is 212201332459. The reversal of 212201332421 is 124233102212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75467781796 + 136733550625 = 274714^2 + 369775^2 .

It is a cyclic number.

It is not a de Polignac number, because 212201332421 - 2¹⁴ = 212201316037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201332471) 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, 8161589696 + ... + 8161589721.

It is an arithmetic number, because the mean of its divisors is an integer number (57131127963).

Almost surely, 2^212201332421 is an apocalyptic number.

It is an amenable number.

212201332421 is a deficient number, since it is larger than the sum of its proper divisors (16323179431).

212201332421 is a wasteful number, since it uses less digits than its factorization.

212201332421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16323179430.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 212201332421 its reverse (124233102212), we get a palindrome (336434434633).

The spelling of 212201332421 in words is "two hundred twelve billion, two hundred one million, three hundred thirty-two thousand, four hundred twenty-one".