35220321221 has 2 divisors, whose sum is σ = 35220321222. Its totient is φ = 35220321220.

The previous prime is 35220321203. The next prime is 35220321233. The reversal of 35220321221 is 12212302253.

35220321221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32857000225 + 2363320996 = 181265^2 + 48614^2 .

It is an emirp because it is prime and its reverse (12212302253) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 35220321221 - 2¹⁴ = 35220304837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35220321271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17610160610 + 17610160611.

It is an arithmetic number, because the mean of its divisors is an integer number (17610160611).

Almost surely, 2^35220321221 is an apocalyptic number.

It is an amenable number.

35220321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

35220321221 is an equidigital number, since it uses as much as digits as its factorization.

35220321221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 35220321221 its reverse (12212302253), we get a palindrome (47432623474).

It can be divided in two parts, 3522032 and 1221, that added together give a palindrome (3523253).

The spelling of 35220321221 in words is "thirty-five billion, two hundred twenty million, three hundred twenty-one thousand, two hundred twenty-one".