212820448429 has 2 divisors, whose sum is σ = 212820448430. Its totient is φ = 212820448428.

The previous prime is 212820448417. The next prime is 212820448439. The reversal of 212820448429 is 924844028212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137958016329 + 74862432100 = 371427^2 + 273610^2 .

It is a cyclic number.

It is not a de Polignac number, because 212820448429 - 2⁷ = 212820448301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212820448439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106410224214 + 106410224215.

It is an arithmetic number, because the mean of its divisors is an integer number (106410224215).

Almost surely, 2^212820448429 is an apocalyptic number.

It is an amenable number.

212820448429 is a deficient number, since it is larger than the sum of its proper divisors (1).

212820448429 is an equidigital number, since it uses as much as digits as its factorization.

212820448429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 589824, while the sum is 46.

The spelling of 212820448429 in words is "two hundred twelve billion, eight hundred twenty million, four hundred forty-eight thousand, four hundred twenty-nine".