221010202211231 has 2 divisors, whose sum is σ = 221010202211232. Its totient is φ = 221010202211230.

The previous prime is 221010202211209. The next prime is 221010202211233. The reversal of 221010202211231 is 132112202010122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221010202211231 - 2¹⁰ = 221010202210207 is a prime.

It is a super-2 number, since 2×221010202211231² (a number of 29 digits) contains 22 as substring.

Together with 221010202211233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221010202211233) 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, 110505101105615 + 110505101105616.

It is an arithmetic number, because the mean of its divisors is an integer number (110505101105616).

Almost surely, 2^{221010202211231} is an apocalyptic number.

221010202211231 is a deficient number, since it is larger than the sum of its proper divisors (1).

221010202211231 is an equidigital number, since it uses as much as digits as its factorization.

221010202211231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 221010202211231 its reverse (132112202010122), we get a palindrome (353122404221353).

The spelling of 221010202211231 in words is "two hundred twenty-one trillion, ten billion, two hundred two million, two hundred eleven thousand, two hundred thirty-one".