121573229279 has 2 divisors, whose sum is σ = 121573229280. Its totient is φ = 121573229278.

The previous prime is 121573229269. The next prime is 121573229339. The reversal of 121573229279 is 972922375121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121573229279 - 2³² = 117278261983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121573229269) 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, 60786614639 + 60786614640.

It is an arithmetic number, because the mean of its divisors is an integer number (60786614640).

Almost surely, 2^121573229279 is an apocalyptic number.

121573229279 is a deficient number, since it is larger than the sum of its proper divisors (1).

121573229279 is an equidigital number, since it uses as much as digits as its factorization.

121573229279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 50.

The spelling of 121573229279 in words is "one hundred twenty-one billion, five hundred seventy-three million, two hundred twenty-nine thousand, two hundred seventy-nine".