122721705889 has 8 divisors (see below), whose sum is σ = 128071681920. Its totient is φ = 117372917376.

The previous prime is 122721705881. The next prime is 122721705929. The reversal of 122721705889 is 988507127221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122721705889 - 2³ = 122721705881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122721705881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82384 + ... + 502225.

It is an arithmetic number, because the mean of its divisors is an integer number (16008960240).

Almost surely, 2^122721705889 is an apocalyptic number.

It is an amenable number.

122721705889 is a deficient number, since it is larger than the sum of its proper divisors (5349976031).

122721705889 is an equidigital number, since it uses as much as digits as its factorization.

122721705889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593759.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 122721705889 in words is "one hundred twenty-two billion, seven hundred twenty-one million, seven hundred five thousand, eight hundred eighty-nine".