122747321128 has 8 divisors (see below), whose sum is σ = 230151227130. Its totient is φ = 61373660560.

The previous prime is 122747321113. The next prime is 122747321149. The reversal of 122747321128 is 821123747221.

It can be written as a sum of positive squares in only one way, i.e., 104715665604 + 18031655524 = 323598^2 + 134282^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7671707563 + ... + 7671707578.

Almost surely, 2^122747321128 is an apocalyptic number.

It is an amenable number.

122747321128 is a deficient number, since it is larger than the sum of its proper divisors (107403906002).

122747321128 is a wasteful number, since it uses less digits than its factorization.

122747321128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15343415147 (or 15343415143 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The spelling of 122747321128 in words is "one hundred twenty-two billion, seven hundred forty-seven million, three hundred twenty-one thousand, one hundred twenty-eight".