30000120031 has 16 divisors (see below), whose sum is σ = 36635734080. Its totient is φ = 23979732480.

The previous prime is 30000119993. The next prime is 30000120043. The reversal of 30000120031 is 13002100003.

It is a cyclic number.

It is not a de Polignac number, because 30000120031 - 2¹⁷ = 29999988959 is a prime.

It is a super-2 number, since 2×30000120031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30000120061) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 1143460 + ... + 1169401.

It is an arithmetic number, because the mean of its divisors is an integer number (2289733380).

Almost surely, 2^30000120031 is an apocalyptic number.

30000120031 is a deficient number, since it is larger than the sum of its proper divisors (6635614049).

30000120031 is a wasteful number, since it uses less digits than its factorization.

30000120031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312994.

The product of its (nonzero) digits is 18, while the sum is 10.

Adding to 30000120031 its reverse (13002100003), we get a palindrome (43002220034).

The spelling of 30000120031 in words is "thirty billion, one hundred twenty thousand, thirty-one".