122621720161 has 8 divisors (see below), whose sum is σ = 122850517248. Its totient is φ = 122393118000.

The previous prime is 122621720149. The next prime is 122621720189. The reversal of 122621720161 is 161027126221.

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 122621720161 - 2¹⁷ = 122621589089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122621720561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1242256 + ... + 1337326.

It is an arithmetic number, because the mean of its divisors is an integer number (15356314656).

Almost surely, 2^122621720161 is an apocalyptic number.

It is an amenable number.

122621720161 is a deficient number, since it is larger than the sum of its proper divisors (228797087).

122621720161 is an equidigital number, since it uses as much as digits as its factorization.

122621720161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97463.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 122621720161 its reverse (161027126221), we get a palindrome (283648846382).

The spelling of 122621720161 in words is "one hundred twenty-two billion, six hundred twenty-one million, seven hundred twenty thousand, one hundred sixty-one".