121701924809 has 2 divisors, whose sum is σ = 121701924810. Its totient is φ = 121701924808.

The previous prime is 121701924791. The next prime is 121701924829. The reversal of 121701924809 is 908429107121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107859696400 + 13842228409 = 328420^2 + 117653^2 .

It is a cyclic number.

It is not a de Polignac number, because 121701924809 - 2¹² = 121701920713 is a prime.

It is a super-2 number, since 2×121701924809² (a number of 23 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 121701924809.

It is not a weakly prime, because it can be changed into another prime (121701924829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60850962404 + 60850962405.

It is an arithmetic number, because the mean of its divisors is an integer number (60850962405).

Almost surely, 2^121701924809 is an apocalyptic number.

It is an amenable number.

121701924809 is a deficient number, since it is larger than the sum of its proper divisors (1).

121701924809 is an equidigital number, since it uses as much as digits as its factorization.

121701924809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 121701924809 in words is "one hundred twenty-one billion, seven hundred one million, nine hundred twenty-four thousand, eight hundred nine".