221232414209 has 2 divisors, whose sum is σ = 221232414210. Its totient is φ = 221232414208.

The previous prime is 221232414121. The next prime is 221232414331. The reversal of 221232414209 is 902414232122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124536292609 + 96696121600 = 352897^2 + 310960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221232414209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (221232414709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110616207104 + 110616207105.

It is an arithmetic number, because the mean of its divisors is an integer number (110616207105).

Almost surely, 2^221232414209 is an apocalyptic number.

It is an amenable number.

221232414209 is a deficient number, since it is larger than the sum of its proper divisors (1).

221232414209 is an equidigital number, since it uses as much as digits as its factorization.

221232414209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 221232414209 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred fourteen thousand, two hundred nine".