21110321201 has 2 divisors, whose sum is σ = 21110321202. Its totient is φ = 21110321200.

The previous prime is 21110321189. The next prime is 21110321213. The reversal of 21110321201 is 10212301112.

It is a balanced prime because it is at equal distance from previous prime (21110321189) and next prime (21110321213).

It can be written as a sum of positive squares in only one way, i.e., 20685342976 + 424978225 = 143824^2 + 20615^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110321201 - 2³⁰ = 20036579377 is a prime.

It is a super-2 number, since 2×21110321201² (a number of 21 digits) contains 22 as substring.

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 (21110321291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555160600 + 10555160601.

It is an arithmetic number, because the mean of its divisors is an integer number (10555160601).

Almost surely, 2^21110321201 is an apocalyptic number.

It is an amenable number.

21110321201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110321201 is an equidigital number, since it uses as much as digits as its factorization.

21110321201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21110321201 its reverse (10212301112), we get a palindrome (31322622313).

The spelling of 21110321201 in words is "twenty-one billion, one hundred ten million, three hundred twenty-one thousand, two hundred one".