30120311131 has 4 divisors (see below), whose sum is σ = 30934373632. Its totient is φ = 29306248632.

The previous prime is 30120311129. The next prime is 30120311141. The reversal of 30120311131 is 13111302103.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30120311131 - 2¹ = 30120311129 is a prime.

It is a super-2 number, since 2×30120311131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30120311141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407031195 + ... + 407031268.

It is an arithmetic number, because the mean of its divisors is an integer number (7733593408).

Almost surely, 2^30120311131 is an apocalyptic number.

30120311131 is a deficient number, since it is larger than the sum of its proper divisors (814062501).

30120311131 is an equidigital number, since it uses as much as digits as its factorization.

30120311131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814062500.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 30120311131 its reverse (13111302103), we get a palindrome (43231613234).

The spelling of 30120311131 in words is "thirty billion, one hundred twenty million, three hundred eleven thousand, one hundred thirty-one".