30112021 has 4 divisors (see below), whose sum is σ = 30254944. Its totient is φ = 29969100.

The previous prime is 30111971. The next prime is 30112051. The reversal of 30112021 is 12021103.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12021103 = 179 ⋅67157.

It is a cyclic number.

It is not a de Polignac number, because 30112021 - 2²¹ = 28014869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30111989 and 30112007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30112051) 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, 71145 + ... + 71566.

It is an arithmetic number, because the mean of its divisors is an integer number (7563736).

Almost surely, 2^30112021 is an apocalyptic number.

It is an amenable number.

30112021 is a deficient number, since it is larger than the sum of its proper divisors (142923).

30112021 is a wasteful number, since it uses less digits than its factorization.

30112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142922.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 30112021 is about 5487.4421181458. The cubic root of 30112021 is about 311.1095205370.

Adding to 30112021 its reverse (12021103), we get a palindrome (42133124).

The spelling of 30112021 in words is "thirty million, one hundred twelve thousand, twenty-one".