122664345721988 has 24 divisors (see below), whose sum is σ = 249957534681792. Its totient is φ = 51578538901344.

The previous prime is 122664345721987. The next prime is 122664345722059. The reversal of 122664345721988 is 889127543466221.

It is a super-2 number, since 2×122664345721988² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122664345721987) 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, 41328955970 + ... + 41328958937.

It is an arithmetic number, because the mean of its divisors is an integer number (10414897278408).

Almost surely, 2^{122664345721988} is an apocalyptic number.

It is an amenable number.

122664345721988 is an abundant number, since it is smaller than the sum of its proper divisors (127293188959804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122664345721988 is a wasteful number, since it uses less digits than its factorization.

122664345721988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82657914971 (or 82657914969 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 68.

The spelling of 122664345721988 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 eighty-eight".