202421212447 has 2 divisors, whose sum is σ = 202421212448. Its totient is φ = 202421212446.

The previous prime is 202421212421. The next prime is 202421212471. The reversal of 202421212447 is 744212124202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202421212447 - 2¹¹ = 202421210399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202421252447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101210606223 + 101210606224.

It is an arithmetic number, because the mean of its divisors is an integer number (101210606224).

Almost surely, 2^202421212447 is an apocalyptic number.

202421212447 is a deficient number, since it is larger than the sum of its proper divisors (1).

202421212447 is an equidigital number, since it uses as much as digits as its factorization.

202421212447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 31.

Adding to 202421212447 its reverse (744212124202), we get a palindrome (946633336649).

The spelling of 202421212447 in words is "two hundred two billion, four hundred twenty-one million, two hundred twelve thousand, four hundred forty-seven".