122080721 has 4 divisors (see below), whose sum is σ = 139520832. Its totient is φ = 104640612.

The previous prime is 122080669. The next prime is 122080727. The reversal of 122080721 is 127080221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122080721 - 2¹⁸ = 121818577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122080727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8720045 + ... + 8720058.

It is an arithmetic number, because the mean of its divisors is an integer number (34880208).

Almost surely, 2^122080721 is an apocalyptic number.

It is an amenable number.

122080721 is a deficient number, since it is larger than the sum of its proper divisors (17440111).

122080721 is an equidigital number, since it uses as much as digits as its factorization.

122080721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17440110.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 122080721 is about 11049.0144809390. The cubic root of 122080721 is about 496.0769275085.

The spelling of 122080721 in words is "one hundred twenty-two million, eighty thousand, seven hundred twenty-one".