212530514221 has 2 divisors, whose sum is σ = 212530514222. Its totient is φ = 212530514220.

The previous prime is 212530514177. The next prime is 212530514227. The reversal of 212530514221 is 122415035212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110762496100 + 101768018121 = 332810^2 + 319011^2 .

It is a cyclic number.

It is not a de Polignac number, because 212530514221 - 2¹³ = 212530506029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212530514221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212530514227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106265257110 + 106265257111.

It is an arithmetic number, because the mean of its divisors is an integer number (106265257111).

Almost surely, 2^212530514221 is an apocalyptic number.

It is an amenable number.

212530514221 is a deficient number, since it is larger than the sum of its proper divisors (1).

212530514221 is an equidigital number, since it uses as much as digits as its factorization.

212530514221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 212530514221 its reverse (122415035212), we get a palindrome (334945549433).

The spelling of 212530514221 in words is "two hundred twelve billion, five hundred thirty million, five hundred fourteen thousand, two hundred twenty-one".