21032022217 has 2 divisors, whose sum is σ = 21032022218. Its totient is φ = 21032022216.

The previous prime is 21032022211. The next prime is 21032022229. The reversal of 21032022217 is 71222023012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20265230736 + 766791481 = 142356^2 + 27691^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032022217 - 2¹⁵ = 21031989449 is a prime.

It is not a weakly prime, because it can be changed into another prime (21032022211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516011108 + 10516011109.

It is an arithmetic number, because the mean of its divisors is an integer number (10516011109).

Almost surely, 2^21032022217 is an apocalyptic number.

It is an amenable number.

21032022217 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032022217 is an equidigital number, since it uses as much as digits as its factorization.

21032022217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 21032022217 its reverse (71222023012), we get a palindrome (92254045229).

The spelling of 21032022217 in words is "twenty-one billion, thirty-two million, twenty-two thousand, two hundred seventeen".