30131123121 has 64 divisors (see below), whose sum is σ = 49870080000. Its totient is φ = 17824847040.

The previous prime is 30131123107. The next prime is 30131123161. The reversal of 30131123121 is 12132113103.

30131123121 is a `hidden beast` number, since 301 + 311 + 2 + 31 + 21 = 666.

It is not a de Polignac number, because 30131123121 - 2⁵ = 30131123089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30131123094 and 30131123103.

It is not an unprimeable number, because it can be changed into a prime (30131123101) 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 63 ways as a sum of consecutive naturals, for example, 3127650 + ... + 3137268.

It is an arithmetic number, because the mean of its divisors is an integer number (779220000).

Almost surely, 2^30131123121 is an apocalyptic number.

It is an amenable number.

30131123121 is a deficient number, since it is larger than the sum of its proper divisors (19738956879).

30131123121 is a wasteful number, since it uses less digits than its factorization.

30131123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9891 (or 9885 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 30131123121 its reverse (12132113103), we get a palindrome (42263236224).

The spelling of 30131123121 in words is "thirty billion, one hundred thirty-one million, one hundred twenty-three thousand, one hundred twenty-one".