121985992273 has 2 divisors, whose sum is σ = 121985992274. Its totient is φ = 121985992272.

The previous prime is 121985992259. The next prime is 121985992291. The reversal of 121985992273 is 372299589121.

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., 89956805184 + 32029187089 = 299928^2 + 178967^2 .

It is a cyclic number.

It is not a de Polignac number, because 121985992273 - 2³³ = 113396057681 is a prime.

It is not a weakly prime, because it can be changed into another prime (121985992213) 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, 60992996136 + 60992996137.

It is an arithmetic number, because the mean of its divisors is an integer number (60992996137).

Almost surely, 2^121985992273 is an apocalyptic number.

It is an amenable number.

121985992273 is a deficient number, since it is larger than the sum of its proper divisors (1).

121985992273 is an equidigital number, since it uses as much as digits as its factorization.

121985992273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 58.

The spelling of 121985992273 in words is "one hundred twenty-one billion, nine hundred eighty-five million, nine hundred ninety-two thousand, two hundred seventy-three".