21220122102241 has 2 divisors, whose sum is σ = 21220122102242. Its totient is φ = 21220122102240.

The previous prime is 21220122102229. The next prime is 21220122102259. The reversal of 21220122102241 is 14220122102212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16109827827025 + 5110294275216 = 4013705^2 + 2260596^2 .

It is a cyclic number.

It is not a de Polignac number, because 21220122102241 - 2¹¹ = 21220122100193 is a prime.

It is not a weakly prime, because it can be changed into another prime (21220122172241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610061051120 + 10610061051121.

It is an arithmetic number, because the mean of its divisors is an integer number (10610061051121).

Almost surely, 2^{21220122102241} is an apocalyptic number.

It is an amenable number.

21220122102241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220122102241 is an equidigital number, since it uses as much as digits as its factorization.

21220122102241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21220122102241 its reverse (14220122102212), we get a palindrome (35440244204453).

The spelling of 21220122102241 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred two thousand, two hundred forty-one".