212011243421 has 8 divisors (see below), whose sum is σ = 227644219584. Its totient is φ = 196729570240.

The previous prime is 212011243403. The next prime is 212011243447. The reversal of 212011243421 is 124342110212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212011243421 - 2¹⁰ = 212011242397 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 (212011243471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87824495 + ... + 87826908.

It is an arithmetic number, because the mean of its divisors is an integer number (28455527448).

Almost surely, 2^212011243421 is an apocalyptic number.

It is an amenable number.

212011243421 is a deficient number, since it is larger than the sum of its proper divisors (15632976163).

212011243421 is a wasteful number, since it uses less digits than its factorization.

212011243421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175651491.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 212011243421 its reverse (124342110212), we get a palindrome (336353353633).

The spelling of 212011243421 in words is "two hundred twelve billion, eleven million, two hundred forty-three thousand, four hundred twenty-one".