21032021201 has 2 divisors, whose sum is σ = 21032021202. Its totient is φ = 21032021200.

The previous prime is 21032021149. The next prime is 21032021209. The reversal of 21032021201 is 10212023012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19725921601 + 1306099600 = 140449^2 + 36140^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032021201 - 2⁶ = 21032021137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21032021209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516010600 + 10516010601.

It is an arithmetic number, because the mean of its divisors is an integer number (10516010601).

Almost surely, 2^21032021201 is an apocalyptic number.

It is an amenable number.

21032021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032021201 is an equidigital number, since it uses as much as digits as its factorization.

21032021201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21032021201 its reverse (10212023012), we get a palindrome (31244044213).

The spelling of 21032021201 in words is "twenty-one billion, thirty-two million, twenty-one thousand, two hundred one".