30121131 has 8 divisors (see below), whose sum is σ = 40233424. Its totient is φ = 20044800.

The previous prime is 30121097. The next prime is 30121151. The reversal of 30121131 is 13112103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30121131 - 2¹¹ = 30119083 is a prime.

It is a super-2 number, since 2×30121131² = 1814565065438322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30121151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6970 + ... + 10431.

It is an arithmetic number, because the mean of its divisors is an integer number (5029178).

Almost surely, 2^30121131 is an apocalyptic number.

30121131 is a deficient number, since it is larger than the sum of its proper divisors (10112293).

30121131 is a wasteful number, since it uses less digits than its factorization.

30121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17981.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 30121131 is about 5488.2721324657. The cubic root of 30121131 is about 311.1408914189.

Adding to 30121131 its reverse (13112103), we get a palindrome (43233234).

Subtracting from 30121131 its reverse (13112103), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 30121131 in words is "thirty million, one hundred twenty-one thousand, one hundred thirty-one".