221441212231 has 2 divisors, whose sum is σ = 221441212232. Its totient is φ = 221441212230.

The previous prime is 221441212229. The next prime is 221441212247. The reversal of 221441212231 is 132212144122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221441212231 - 2¹ = 221441212229 is a prime.

It is a super-2 number, since 2×221441212231² (a number of 23 digits) contains 22 as substring.

Together with 221441212229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 221441212196 and 221441212205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221441215231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110720606115 + 110720606116.

It is an arithmetic number, because the mean of its divisors is an integer number (110720606116).

Almost surely, 2^221441212231 is an apocalyptic number.

221441212231 is a deficient number, since it is larger than the sum of its proper divisors (1).

221441212231 is an equidigital number, since it uses as much as digits as its factorization.

221441212231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 25.

Adding to 221441212231 its reverse (132212144122), we get a palindrome (353653356353).

The spelling of 221441212231 in words is "two hundred twenty-one billion, four hundred forty-one million, two hundred twelve thousand, two hundred thirty-one".