30311121 has 4 divisors (see below), whose sum is σ = 40414832. Its totient is φ = 20207412.

The previous prime is 30311093. The next prime is 30311129. The reversal of 30311121 is 12111303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30311121 - 2¹⁰ = 30310097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30311097 and 30311106.

It is not an unprimeable number, because it can be changed into a prime (30311129) 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, 5051851 + ... + 5051856.

It is an arithmetic number, because the mean of its divisors is an integer number (10103708).

Almost surely, 2^30311121 is an apocalyptic number.

It is an amenable number.

30311121 is a deficient number, since it is larger than the sum of its proper divisors (10103711).

30311121 is a wasteful number, since it uses less digits than its factorization.

30311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10103710.

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

The square root of 30311121 is about 5505.5536506331. The cubic root of 30311121 is about 311.7936978553.

Adding to 30311121 its reverse (12111303), we get a palindrome (42422424).

The spelling of 30311121 in words is "thirty million, three hundred eleven thousand, one hundred twenty-one".