211010022221 has 2 divisors, whose sum is σ = 211010022222. Its totient is φ = 211010022220.

The previous prime is 211010022173. The next prime is 211010022257. The reversal of 211010022221 is 122220010112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195196959721 + 15813062500 = 441811^2 + 125750^2 .

It is a cyclic number.

It is not a de Polignac number, because 211010022221 - 2¹⁴ = 211010005837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211010022196 and 211010022205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211010022121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505011110 + 105505011111.

It is an arithmetic number, because the mean of its divisors is an integer number (105505011111).

Almost surely, 2^211010022221 is an apocalyptic number.

It is an amenable number.

211010022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

211010022221 is an equidigital number, since it uses as much as digits as its factorization.

211010022221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211010022221 its reverse (122220010112), we get a palindrome (333230032333).

The spelling of 211010022221 in words is "two hundred eleven billion, ten million, twenty-two thousand, two hundred twenty-one".