221010211112021 has 2 divisors, whose sum is σ = 221010211112022. Its totient is φ = 221010211112020.

The previous prime is 221010211112003. The next prime is 221010211112051. The reversal of 221010211112021 is 120211112010122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192975717064900 + 28034494047121 = 13891570^2 + 5294761^2 .

It is a cyclic number.

It is not a de Polignac number, because 221010211112021 - 2⁶ = 221010211111957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221010211112051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505105556010 + 110505105556011.

It is an arithmetic number, because the mean of its divisors is an integer number (110505105556011).

Almost surely, 2^{221010211112021} is an apocalyptic number.

It is an amenable number.

221010211112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

221010211112021 is an equidigital number, since it uses as much as digits as its factorization.

221010211112021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221010211112021 its reverse (120211112010122), we get a palindrome (341221323122143).

The spelling of 221010211112021 in words is "two hundred twenty-one trillion, ten billion, two hundred eleven million, one hundred twelve thousand, twenty-one".