301990387122 has 18 divisors (see below), whose sum is σ = 654317557023. Its totient is φ = 100662685212.

The previous prime is 301990387109. The next prime is 301990387129. The reversal of 301990387122 is 221783099103.

It can be written as a sum of positive squares in only one way, i.e., 150995193561 + 150995193561 = 388581^2 + 388581^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=388581.

It is not an unprimeable number, because it can be changed into a prime (301990387129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2266723 + ... + 2396249.

Almost surely, 2^301990387122 is an apocalyptic number.

301990387122 is an abundant number, since it is smaller than the sum of its proper divisors (352327169901).

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

301990387122 is an frugal number, since it uses more digits than its factorization.

301990387122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259062 (or 129532 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 301990387122 in words is "three hundred one billion, nine hundred ninety million, three hundred eighty-seven thousand, one hundred twenty-two".