122164721 has 8 divisors (see below), whose sum is σ = 139730304. Its totient is φ = 104627520.

The previous prime is 122164717. The next prime is 122164739. The reversal of 122164721 is 127461221.

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 122164721 - 2² = 122164717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122164741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3116 + ... + 15938.

It is an arithmetic number, because the mean of its divisors is an integer number (17466288).

Almost surely, 2^122164721 is an apocalyptic number.

It is an amenable number.

122164721 is a deficient number, since it is larger than the sum of its proper divisors (17565583).

122164721 is a wasteful number, since it uses less digits than its factorization.

122164721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14191.

The product of its digits is 1344, while the sum is 26.

The square root of 122164721 is about 11052.8150712839. The cubic root of 122164721 is about 496.1906798625.

The spelling of 122164721 in words is "one hundred twenty-two million, one hundred sixty-four thousand, seven hundred twenty-one".