121753321 has 2 divisors, whose sum is σ = 121753322. Its totient is φ = 121753320.

The previous prime is 121753259. The next prime is 121753361. The reversal of 121753321 is 123357121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117505600 + 4247721 = 10840^2 + 2061^2 .

It is an emirp because it is prime and its reverse (123357121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121753321 - 2⁷ = 121753193 is a prime.

It is not a weakly prime, because it can be changed into another prime (121753361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60876660 + 60876661.

It is an arithmetic number, because the mean of its divisors is an integer number (60876661).

Almost surely, 2^121753321 is an apocalyptic number.

It is an amenable number.

121753321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121753321 is an equidigital number, since it uses as much as digits as its factorization.

121753321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 25.

The square root of 121753321 is about 11034.1887332055. The cubic root of 121753321 is about 495.6330654696.

The spelling of 121753321 in words is "one hundred twenty-one million, seven hundred fifty-three thousand, three hundred twenty-one".