121010020609 has 2 divisors, whose sum is σ = 121010020610. Its totient is φ = 121010020608.

The previous prime is 121010020603. The next prime is 121010020667. The reversal of 121010020609 is 906020010121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101318073025 + 19691947584 = 318305^2 + 140328^2 .

It is a cyclic number.

It is not a de Polignac number, because 121010020609 - 2³ = 121010020601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121010020609.

It is not a weakly prime, because it can be changed into another prime (121010020601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505010304 + 60505010305.

It is an arithmetic number, because the mean of its divisors is an integer number (60505010305).

Almost surely, 2^121010020609 is an apocalyptic number.

It is an amenable number.

121010020609 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010020609 is an equidigital number, since it uses as much as digits as its factorization.

121010020609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 121010020609 in words is "one hundred twenty-one billion, ten million, twenty thousand, six hundred nine".