121221222302009 has 2 divisors, whose sum is σ = 121221222302010. Its totient is φ = 121221222302008.

The previous prime is 121221222301981. The next prime is 121221222302017. The reversal of 121221222302009 is 900203222122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110557549183225 + 10663673118784 = 10514635^2 + 3265528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221222302009 is a prime.

It is a super-2 number, since 2×121221222302009² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121221222302029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610611151004 + 60610611151005.

It is an arithmetic number, because the mean of its divisors is an integer number (60610611151005).

Almost surely, 2^{121221222302009} is an apocalyptic number.

It is an amenable number.

121221222302009 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221222302009 is an equidigital number, since it uses as much as digits as its factorization.

121221222302009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 121221222302009 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-two million, three hundred two thousand, nine".