30120031133 has 6 divisors (see below), whose sum is σ = 31486535934. Its totient is φ = 28810464056.

The previous prime is 30120031063. The next prime is 30120031171. The reversal of 30120031133 is 33113002103.

It can be written as a sum of positive squares in only one way, i.e., 29867443684 + 252587449 = 172822^2 + 15893^2 .

It is not a de Polignac number, because 30120031133 - 2¹² = 30120027037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120031033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28468310 + ... + 28469367.

It is an arithmetic number, because the mean of its divisors is an integer number (5247755989).

Almost surely, 2^30120031133 is an apocalyptic number.

It is an amenable number.

30120031133 is a deficient number, since it is larger than the sum of its proper divisors (1366504801).

30120031133 is an equidigital number, since it uses as much as digits as its factorization.

30120031133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56937723 (or 56937700 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 30120031133 its reverse (33113002103), we get a palindrome (63233033236).

The spelling of 30120031133 in words is "thirty billion, one hundred twenty million, thirty-one thousand, one hundred thirty-three".