105245214443221 has 2 divisors, whose sum is σ = 105245214443222. Its totient is φ = 105245214443220.

The previous prime is 105245214443147. The next prime is 105245214443249. The reversal of 105245214443221 is 122344412542501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98638386802596 + 6606827640625 = 9931686^2 + 2570375^2 .

It is a cyclic number.

It is not a de Polignac number, because 105245214443221 - 2³¹ = 105243066959573 is a prime.

It is a super-2 number, since 2×105245214443221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105245214443921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52622607221610 + 52622607221611.

It is an arithmetic number, because the mean of its divisors is an integer number (52622607221611).

Almost surely, 2^{105245214443221} is an apocalyptic number.

It is an amenable number.

105245214443221 is a deficient number, since it is larger than the sum of its proper divisors (1).

105245214443221 is an equidigital number, since it uses as much as digits as its factorization.

105245214443221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 307200, while the sum is 40.

Adding to 105245214443221 its reverse (122344412542501), we get a palindrome (227589626985722).

The spelling of 105245214443221 in words is "one hundred five trillion, two hundred forty-five billion, two hundred fourteen million, four hundred forty-three thousand, two hundred twenty-one".