221466242441 has 2 divisors, whose sum is σ = 221466242442. Its totient is φ = 221466242440.

The previous prime is 221466242383. The next prime is 221466242461. The reversal of 221466242441 is 144242664122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218804095225 + 2662147216 = 467765^2 + 51596^2 .

It is a cyclic number.

It is not a de Polignac number, because 221466242441 - 2²⁶ = 221399133577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221466242395 and 221466242404.

It is not a weakly prime, because it can be changed into another prime (221466242461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110733121220 + 110733121221.

It is an arithmetic number, because the mean of its divisors is an integer number (110733121221).

Almost surely, 2^221466242441 is an apocalyptic number.

It is an amenable number.

221466242441 is a deficient number, since it is larger than the sum of its proper divisors (1).

221466242441 is an equidigital number, since it uses as much as digits as its factorization.

221466242441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147456, while the sum is 38.

The spelling of 221466242441 in words is "two hundred twenty-one billion, four hundred sixty-six million, two hundred forty-two thousand, four hundred forty-one".