21010201211201 has 2 divisors, whose sum is σ = 21010201211202. Its totient is φ = 21010201211200.

The previous prime is 21010201211191. The next prime is 21010201211203. The reversal of 21010201211201 is 10211210201012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15798915796225 + 5211285414976 = 3974785^2 + 2282824^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010201211201 - 2³⁴ = 20993021342017 is a prime.

Together with 21010201211203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21010201211203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505100605600 + 10505100605601.

It is an arithmetic number, because the mean of its divisors is an integer number (10505100605601).

Almost surely, 2^{21010201211201} is an apocalyptic number.

It is an amenable number.

21010201211201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010201211201 is an equidigital number, since it uses as much as digits as its factorization.

21010201211201 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 14.

Adding to 21010201211201 its reverse (10211210201012), we get a palindrome (31221411412213).

The spelling of 21010201211201 in words is "twenty-one trillion, ten billion, two hundred one million, two hundred eleven thousand, two hundred one".