122184721 has 2 divisors, whose sum is σ = 122184722. Its totient is φ = 122184720.

The previous prime is 122184707. The next prime is 122184731. The reversal of 122184721 is 127481221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93412225 + 28772496 = 9665^2 + 5364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122184721 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122184721.

It is not a weakly prime, because it can be changed into another prime (122184731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61092360 + 61092361.

It is an arithmetic number, because the mean of its divisors is an integer number (61092361).

Almost surely, 2^122184721 is an apocalyptic number.

It is an amenable number.

122184721 is a deficient number, since it is larger than the sum of its proper divisors (1).

122184721 is an equidigital number, since it uses as much as digits as its factorization.

122184721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 28.

The square root of 122184721 is about 11053.7197811416. The cubic root of 122184721 is about 496.2177560702.

The spelling of 122184721 in words is "one hundred twenty-two million, one hundred eighty-four thousand, seven hundred twenty-one".