122664345721921 has 8 divisors (see below), whose sum is σ = 123519898166400. Its totient is φ = 121809223968432.

The previous prime is 122664345721787. The next prime is 122664345721987. The reversal of 122664345721921 is 129127543466221.

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 122664345721921 - 2¹¹ = 122664345719873 is a prime.

It is a super-2 number, since 2×122664345721921² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122664345701921) 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, 107101135 + ... + 108240388.

It is an arithmetic number, because the mean of its divisors is an integer number (15439987270800).

Almost surely, 2^{122664345721921} is an apocalyptic number.

It is an amenable number.

122664345721921 is a deficient number, since it is larger than the sum of its proper divisors (855552444479).

122664345721921 is a wasteful number, since it uses less digits than its factorization.

122664345721921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215345495.

The product of its digits is 8709120, while the sum is 55.

The spelling of 122664345721921 in words is "one hundred twenty-two trillion, six hundred sixty-four billion, three hundred forty-five million, seven hundred twenty-one thousand, nine hundred twenty-one".