2198434469221 has 2 divisors, whose sum is σ = 2198434469222. Its totient is φ = 2198434469220.

The previous prime is 2198434469183. The next prime is 2198434469227. The reversal of 2198434469221 is 1229644348912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1690621457121 + 507813012100 = 1300239^2 + 712610^2 .

It is a cyclic number.

It is not a de Polignac number, because 2198434469221 - 2⁷ = 2198434469093 is a prime.

It is a super-2 number, since 2×2198434469221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2198434469227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099217234610 + 1099217234611.

It is an arithmetic number, because the mean of its divisors is an integer number (1099217234611).

Almost surely, 2^{2198434469221} is an apocalyptic number.

It is an amenable number.

2198434469221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2198434469221 is an equidigital number, since it uses as much as digits as its factorization.

2198434469221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5971968, while the sum is 55.

The spelling of 2198434469221 in words is "two trillion, one hundred ninety-eight billion, four hundred thirty-four million, four hundred sixty-nine thousand, two hundred twenty-one".