789012210221 has 2 divisors, whose sum is σ = 789012210222. Its totient is φ = 789012210220.

The previous prime is 789012210187. The next prime is 789012210223. The reversal of 789012210221 is 122012210987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 502638460900 + 286373749321 = 708970^2 + 535139^2 .

It is an emirp because it is prime and its reverse (122012210987) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-789012210221 is a prime.

Together with 789012210223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (789012210223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394506105110 + 394506105111.

It is an arithmetic number, because the mean of its divisors is an integer number (394506105111).

Almost surely, 2^789012210221 is an apocalyptic number.

It is an amenable number.

789012210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

789012210221 is an equidigital number, since it uses as much as digits as its factorization.

789012210221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The spelling of 789012210221 in words is "seven hundred eighty-nine billion, twelve million, two hundred ten thousand, two hundred twenty-one".