121321223212009 has 2 divisors, whose sum is σ = 121321223212010. Its totient is φ = 121321223212008.

The previous prime is 121321223211989. The next prime is 121321223212027. The reversal of 121321223212009 is 900212322123121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62344920974400 + 58976302237609 = 7895880^2 + 7679603^2 .

It is a cyclic number.

It is not a de Polignac number, because 121321223212009 - 2¹¹ = 121321223209961 is a prime.

It is a super-2 number, since 2×121321223212009² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121321223212099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660611606004 + 60660611606005.

It is an arithmetic number, because the mean of its divisors is an integer number (60660611606005).

Almost surely, 2^{121321223212009} is an apocalyptic number.

It is an amenable number.

121321223212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321223212009 is an equidigital number, since it uses as much as digits as its factorization.

121321223212009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 121321223212009 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, two hundred twenty-three million, two hundred twelve thousand, nine".