2221105231 has 2 divisors, whose sum is σ = 2221105232. Its totient is φ = 2221105230.

The previous prime is 2221105213. The next prime is 2221105253. The reversal of 2221105231 is 1325011222.

Together with previous prime (2221105213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221105231 - 2⁹ = 2221104719 is a prime.

It is a super-2 number, since 2×2221105231² = 9866616894351126722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221105199 and 2221105208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221105261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110552615 + 1110552616.

It is an arithmetic number, because the mean of its divisors is an integer number (1110552616).

Almost surely, 2^2221105231 is an apocalyptic number.

2221105231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221105231 is an equidigital number, since it uses as much as digits as its factorization.

2221105231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2221105231 is about 47128.6031089401. The cubic root of 2221105231 is about 1304.7372001064.

Adding to 2221105231 its reverse (1325011222), we get a palindrome (3546116453).

The spelling of 2221105231 in words is "two billion, two hundred twenty-one million, one hundred five thousand, two hundred thirty-one".