1000211210221 has 2 divisors, whose sum is σ = 1000211210222. Its totient is φ = 1000211210220.

The previous prime is 1000211210209. The next prime is 1000211210227. The reversal of 1000211210221 is 1220121120001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602036328100 + 398174882121 = 775910^2 + 631011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000211210221 - 2³⁵ = 965851471853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000211210227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500105605110 + 500105605111.

It is an arithmetic number, because the mean of its divisors is an integer number (500105605111).

Almost surely, 2^{1000211210221} is an apocalyptic number.

It is an amenable number.

1000211210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000211210221 is an equidigital number, since it uses as much as digits as its factorization.

1000211210221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1000211210221 its reverse (1220121120001), we get a palindrome (2220332330222).

The spelling of 1000211210221 in words is "one trillion, two hundred eleven million, two hundred ten thousand, two hundred twenty-one".