121022129609 has 2 divisors, whose sum is σ = 121022129610. Its totient is φ = 121022129608.

The previous prime is 121022129567. The next prime is 121022129647. The reversal of 121022129609 is 906921220121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70664525584 + 50357604025 = 265828^2 + 224405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121022129609 is a prime.

It is not a weakly prime, because it can be changed into another prime (121022129309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511064804 + 60511064805.

It is an arithmetic number, because the mean of its divisors is an integer number (60511064805).

Almost surely, 2^121022129609 is an apocalyptic number.

It is an amenable number.

121022129609 is a deficient number, since it is larger than the sum of its proper divisors (1).

121022129609 is an equidigital number, since it uses as much as digits as its factorization.

121022129609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 121022129609 in words is "one hundred twenty-one billion, twenty-two million, one hundred twenty-nine thousand, six hundred nine".