30131320122 has 24 divisors (see below), whose sum is σ = 66516312564. Its totient is φ = 9854267904.

The previous prime is 30131320097. The next prime is 30131320129. The reversal of 30131320122 is 22102313103.

30131320122 is a `hidden beast` number, since 301 + 31 + 320 + 12 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29217406761 + 913913361 = 170931^2 + 30231^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30131320095 and 30131320104.

It is not an unprimeable number, because it can be changed into a prime (30131320129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15791143 + ... + 15793050.

Almost surely, 2^30131320122 is an apocalyptic number.

30131320122 is an abundant number, since it is smaller than the sum of its proper divisors (36384992442).

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

30131320122 is a wasteful number, since it uses less digits than its factorization.

30131320122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31584254 (or 31584251 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 30131320122 its reverse (22102313103), we get a palindrome (52233633225).

The spelling of 30131320122 in words is "thirty billion, one hundred thirty-one million, three hundred twenty thousand, one hundred twenty-two".