221877340851269 has 2 divisors, whose sum is σ = 221877340851270. Its totient is φ = 221877340851268.

The previous prime is 221877340851113. The next prime is 221877340851343. The reversal of 221877340851269 is 962158043778122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116533536304900 + 105343804546369 = 10795070^2 + 10263713^2 .

It is a cyclic number.

It is not a de Polignac number, because 221877340851269 - 2⁴⁴ = 204285154806853 is a prime.

It is a super-2 number, since 2×221877340851269² (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 (221877340851769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110938670425634 + 110938670425635.

It is an arithmetic number, because the mean of its divisors is an integer number (110938670425635).

It is a 1-persistent number, because it is pandigital, but 2⋅221877340851269 = 443754681702538 is not.

Almost surely, 2^{221877340851269} is an apocalyptic number.

It is an amenable number.

221877340851269 is a deficient number, since it is larger than the sum of its proper divisors (1).

221877340851269 is an equidigital number, since it uses as much as digits as its factorization.

221877340851269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81285120, while the sum is 65.

The spelling of 221877340851269 in words is "two hundred twenty-one trillion, eight hundred seventy-seven billion, three hundred forty million, eight hundred fifty-one thousand, two hundred sixty-nine".