121722361 has 2 divisors, whose sum is σ = 121722362. Its totient is φ = 121722360.

The previous prime is 121722343. The next prime is 121722373. The reversal of 121722361 is 163227121.

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., 121440400 + 281961 = 11020^2 + 531^2 .

It is a cyclic number.

It is not a de Polignac number, because 121722361 - 2⁹ = 121721849 is a prime.

It is not a weakly prime, because it can be changed into another prime (121722301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60861180 + 60861181.

It is an arithmetic number, because the mean of its divisors is an integer number (60861181).

Almost surely, 2^121722361 is an apocalyptic number.

It is an amenable number.

121722361 is a deficient number, since it is larger than the sum of its proper divisors (1).

121722361 is an equidigital number, since it uses as much as digits as its factorization.

121722361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 121722361 is about 11032.7857316273. The cubic root of 121722361 is about 495.5910512821.

Adding to 121722361 its reverse (163227121), we get a palindrome (284949482).

The spelling of 121722361 in words is "one hundred twenty-one million, seven hundred twenty-two thousand, three hundred sixty-one".