21210110033201 has 2 divisors, whose sum is σ = 21210110033202. Its totient is φ = 21210110033200.

The previous prime is 21210110033183. The next prime is 21210110033209. The reversal of 21210110033201 is 10233001101212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21117002664976 + 93107368225 = 4595324^2 + 305135^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210110033201 - 2³⁴ = 21192930164017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21210110033201.

It is not a weakly prime, because it can be changed into another prime (21210110033209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605055016600 + 10605055016601.

It is an arithmetic number, because the mean of its divisors is an integer number (10605055016601).

Almost surely, 2^{21210110033201} is an apocalyptic number.

It is an amenable number.

21210110033201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210110033201 is an equidigital number, since it uses as much as digits as its factorization.

21210110033201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21210110033201 its reverse (10233001101212), we get a palindrome (31443111134413).

The spelling of 21210110033201 in words is "twenty-one trillion, two hundred ten billion, one hundred ten million, thirty-three thousand, two hundred one".