30121311131 has 4 divisors (see below), whose sum is σ = 30121844064. Its totient is φ = 30120778200.

The previous prime is 30121311113. The next prime is 30121311137. The reversal of 30121311131 is 13111312103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13111312103 = 109 ⋅120287267.

It is a cyclic number.

It is not a de Polignac number, because 30121311131 - 2³⁰ = 29047569307 is a prime.

It is a super-2 number, since 2×30121311131² (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 (30121311137) 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, 170060 + ... + 298601.

It is an arithmetic number, because the mean of its divisors is an integer number (7530461016).

Almost surely, 2^30121311131 is an apocalyptic number.

30121311131 is a deficient number, since it is larger than the sum of its proper divisors (532933).

30121311131 is an equidigital number, since it uses as much as digits as its factorization.

30121311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532932.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 30121311131 its reverse (13111312103), we get a palindrome (43232623234).

The spelling of 30121311131 in words is "thirty billion, one hundred twenty-one million, three hundred eleven thousand, one hundred thirty-one".