221421255265069 has 2 divisors, whose sum is σ = 221421255265070. Its totient is φ = 221421255265068.

The previous prime is 221421255265051. The next prime is 221421255265079. The reversal of 221421255265069 is 960562552124122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185963541554025 + 35457713711044 = 13636845^2 + 5954638^2 .

It is a cyclic number.

It is not a de Polignac number, because 221421255265069 - 2⁵ = 221421255265037 is a prime.

It is a super-2 number, since 2×221421255265069² (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 (221421255265079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710627632534 + 110710627632535.

It is an arithmetic number, because the mean of its divisors is an integer number (110710627632535).

Almost surely, 2^{221421255265069} is an apocalyptic number.

It is an amenable number.

221421255265069 is a deficient number, since it is larger than the sum of its proper divisors (1).

221421255265069 is an equidigital number, since it uses as much as digits as its factorization.

221421255265069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 221421255265069 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-five million, two hundred sixty-five thousand, sixty-nine".