30110021 has 4 divisors (see below), whose sum is σ = 31081344. Its totient is φ = 29138700.

The previous prime is 30109991. The next prime is 30110023. The reversal of 30110021 is 12001103.

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-30110021 is a prime.

It is a super-2 number, since 2×30110021² = 1813226729240882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30109990 and 30110008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30110023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485615 + ... + 485676.

It is an arithmetic number, because the mean of its divisors is an integer number (7770336).

Almost surely, 2^30110021 is an apocalyptic number.

30110021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30110021 is a deficient number, since it is larger than the sum of its proper divisors (971323).

30110021 is an equidigital number, since it uses as much as digits as its factorization.

30110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971322.

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

The square root of 30110021 is about 5487.2598808513. The cubic root of 30110021 is about 311.1026325590.

Adding to 30110021 its reverse (12001103), we get a palindrome (42111124).

The spelling of 30110021 in words is "thirty million, one hundred ten thousand, twenty-one".