221000002212169 has 2 divisors, whose sum is σ = 221000002212170. Its totient is φ = 221000002212168.

The previous prime is 221000002212097. The next prime is 221000002212173. The reversal of 221000002212169 is 961212200000122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192627196160400 + 28372806051769 = 13879020^2 + 5326613^2 .

It is a cyclic number.

It is not a de Polignac number, because 221000002212169 - 2¹⁵ = 221000002179401 is a prime.

It is a super-2 number, since 2×221000002212169² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221000000212169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500001106084 + 110500001106085.

It is an arithmetic number, because the mean of its divisors is an integer number (110500001106085).

Almost surely, 2^{221000002212169} is an apocalyptic number.

It is an amenable number.

221000002212169 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000002212169 is an equidigital number, since it uses as much as digits as its factorization.

221000002212169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 221000002212169 in words is "two hundred twenty-one trillion, two million, two hundred twelve thousand, one hundred sixty-nine".