221232020231 has 2 divisors, whose sum is σ = 221232020232. Its totient is φ = 221232020230.

The previous prime is 221232020227. The next prime is 221232020299. The reversal of 221232020231 is 132020232122.

It is a happy number.

221232020231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221232020231 - 2² = 221232020227 is a prime.

It is a super-2 number, since 2×221232020231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221232020731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110616010115 + 110616010116.

It is an arithmetic number, because the mean of its divisors is an integer number (110616010116).

Almost surely, 2^221232020231 is an apocalyptic number.

221232020231 is a deficient number, since it is larger than the sum of its proper divisors (1).

221232020231 is an equidigital number, since it uses as much as digits as its factorization.

221232020231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221232020231 its reverse (132020232122), we get a palindrome (353252252353).

The spelling of 221232020231 in words is "two hundred twenty-one billion, two hundred thirty-two million, twenty thousand, two hundred thirty-one".