121424202989 has 2 divisors, whose sum is σ = 121424202990. Its totient is φ = 121424202988.

The previous prime is 121424202983. The next prime is 121424203073. The reversal of 121424202989 is 989202424121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78222580489 + 43201622500 = 279683^2 + 207850^2 .

It is a cyclic number.

It is not a de Polignac number, because 121424202989 - 2¹² = 121424198893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121424202983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60712101494 + 60712101495.

It is an arithmetic number, because the mean of its divisors is an integer number (60712101495).

Almost surely, 2^121424202989 is an apocalyptic number.

It is an amenable number.

121424202989 is a deficient number, since it is larger than the sum of its proper divisors (1).

121424202989 is an equidigital number, since it uses as much as digits as its factorization.

121424202989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 121424202989 in words is "one hundred twenty-one billion, four hundred twenty-four million, two hundred two thousand, nine hundred eighty-nine".