212424333421 has 2 divisors, whose sum is σ = 212424333422. Its totient is φ = 212424333420.

The previous prime is 212424333403. The next prime is 212424333439. The reversal of 212424333421 is 124333424212.

It is a balanced prime because it is at equal distance from previous prime (212424333403) and next prime (212424333439).

It can be written as a sum of positive squares in only one way, i.e., 212392861321 + 31472100 = 460861^2 + 5610^2 .

It is a cyclic number.

It is not a de Polignac number, because 212424333421 - 2⁷ = 212424333293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212424333481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106212166710 + 106212166711.

It is an arithmetic number, because the mean of its divisors is an integer number (106212166711).

Almost surely, 2^212424333421 is an apocalyptic number.

It is an amenable number.

212424333421 is a deficient number, since it is larger than the sum of its proper divisors (1).

212424333421 is an equidigital number, since it uses as much as digits as its factorization.

212424333421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 31.

Adding to 212424333421 its reverse (124333424212), we get a palindrome (336757757633).

The spelling of 212424333421 in words is "two hundred twelve billion, four hundred twenty-four million, three hundred thirty-three thousand, four hundred twenty-one".