121121020001209 has 2 divisors, whose sum is σ = 121121020001210. Its totient is φ = 121121020001208.

The previous prime is 121121020001173. The next prime is 121121020001231. The reversal of 121121020001209 is 902100020121121.

It is an a-pointer prime, because the next prime (121121020001231) can be obtained adding 121121020001209 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121004466041209 + 116553960000 = 11000203^2 + 341400^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121020001209 - 2¹⁹ = 121121019476921 is a prime.

It is a super-2 number, since 2×121121020001209² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121121020001209.

It is not a weakly prime, because it can be changed into another prime (121121020004209) 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, 60560510000604 + 60560510000605.

It is an arithmetic number, because the mean of its divisors is an integer number (60560510000605).

Almost surely, 2^{121121020001209} is an apocalyptic number.

It is an amenable number.

121121020001209 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121020001209 is an equidigital number, since it uses as much as digits as its factorization.

121121020001209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 121121020001209 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty million, one thousand, two hundred nine".