221394846269 has 2 divisors, whose sum is σ = 221394846270. Its totient is φ = 221394846268.

The previous prime is 221394846191. The next prime is 221394846287. The reversal of 221394846269 is 962648493122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188910191044 + 32484655225 = 434638^2 + 180235^2 .

It is a cyclic number.

It is not a de Polignac number, because 221394846269 - 2³⁶ = 152675369533 is a prime.

It is a super-2 number, since 2×221394846269² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221394842269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110697423134 + 110697423135.

It is an arithmetic number, because the mean of its divisors is an integer number (110697423135).

Almost surely, 2^221394846269 is an apocalyptic number.

It is an amenable number.

221394846269 is a deficient number, since it is larger than the sum of its proper divisors (1).

221394846269 is an equidigital number, since it uses as much as digits as its factorization.

221394846269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8957952, while the sum is 56.

The spelling of 221394846269 in words is "two hundred twenty-one billion, three hundred ninety-four million, eight hundred forty-six thousand, two hundred sixty-nine".