30131121 has 8 divisors (see below), whose sum is σ = 40328640. Its totient is φ = 20010512.

The previous prime is 30131113. The next prime is 30131137. The reversal of 30131121 is 12113103.

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

It is a cyclic number.

It is not a de Polignac number, because 30131121 - 2³ = 30131113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30131097 and 30131106.

It is not an unprimeable number, because it can be changed into a prime (30131141) 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, 18306 + ... + 19883.

It is an arithmetic number, because the mean of its divisors is an integer number (5041080).

Almost surely, 2^30131121 is an apocalyptic number.

It is an amenable number.

30131121 is a deficient number, since it is larger than the sum of its proper divisors (10197519).

30131121 is a wasteful number, since it uses less digits than its factorization.

30131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38455.

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

The square root of 30131121 is about 5489.1821795236. The cubic root of 30131121 is about 311.1752853680.

Adding to 30131121 its reverse (12113103), we get a palindrome (42244224).

The spelling of 30131121 in words is "thirty million, one hundred thirty-one thousand, one hundred twenty-one".