121512973 has 2 divisors, whose sum is σ = 121512974. Its totient is φ = 121512972.

The previous prime is 121512959. The next prime is 121512977. The reversal of 121512973 is 379215121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61496964 + 60016009 = 7842^2 + 7747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121512973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121512977) 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, 60756486 + 60756487.

It is an arithmetic number, because the mean of its divisors is an integer number (60756487).

Almost surely, 2^121512973 is an apocalyptic number.

It is an amenable number.

121512973 is a deficient number, since it is larger than the sum of its proper divisors (1).

121512973 is an equidigital number, since it uses as much as digits as its factorization.

121512973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 31.

The square root of 121512973 is about 11023.2922940472. The cubic root of 121512973 is about 495.3067146501.

The spelling of 121512973 in words is "one hundred twenty-one million, five hundred twelve thousand, nine hundred seventy-three".