30001121 has 4 divisors (see below), whose sum is σ = 30423744. Its totient is φ = 29578500.

The previous prime is 30001093. The next prime is 30001123. The reversal of 30001121 is 12110003.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30001121 is a prime.

It is a super-2 number, since 2×30001121² = 1800134522513282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30001099 and 30001108.

It is not an unprimeable number, because it can be changed into a prime (30001123) 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, 211205 + ... + 211346.

It is an arithmetic number, because the mean of its divisors is an integer number (7605936).

Almost surely, 2^30001121 is an apocalyptic number.

It is an amenable number.

30001121 is a deficient number, since it is larger than the sum of its proper divisors (422623).

30001121 is an equidigital number, since it uses as much as digits as its factorization.

30001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422622.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 30001121 is about 5477.3279069269. The cubic root of 30001121 is about 310.7271207779.

Adding to 30001121 its reverse (12110003), we get a palindrome (42111124).

The spelling of 30001121 in words is "thirty million, one thousand, one hundred twenty-one".