212221111444009 has 2 divisors, whose sum is σ = 212221111444010. Its totient is φ = 212221111444008.

The previous prime is 212221111443967. The next prime is 212221111444037. The reversal of 212221111444009 is 900444111122212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203013254985984 + 9207856458025 = 14248272^2 + 3034445^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221111444009 - 2¹¹ = 212221111441961 is a prime.

It is not a weakly prime, because it can be changed into another prime (212221111444609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110555722004 + 106110555722005.

It is an arithmetic number, because the mean of its divisors is an integer number (106110555722005).

Almost surely, 2^{212221111444009} is an apocalyptic number.

It is an amenable number.

212221111444009 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221111444009 is an equidigital number, since it uses as much as digits as its factorization.

212221111444009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 212221111444009 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred eleven million, four hundred forty-four thousand, nine".