30112921 has 2 divisors, whose sum is σ = 30112922. Its totient is φ = 30112920.

The previous prime is 30112919. The next prime is 30112963. The reversal of 30112921 is 12921103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27154521 + 2958400 = 5211^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 30112921 - 2¹ = 30112919 is a prime.

It is a super-2 number, since 2×30112921² = 1813576022304482, which contains 22 as substring.

Together with 30112919, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30112421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15056460 + 15056461.

It is an arithmetic number, because the mean of its divisors is an integer number (15056461).

Almost surely, 2^30112921 is an apocalyptic number.

It is an amenable number.

30112921 is a deficient number, since it is larger than the sum of its proper divisors (1).

30112921 is an equidigital number, since it uses as much as digits as its factorization.

30112921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 30112921 is about 5487.5241229538. The cubic root of 30112921 is about 311.1126200276.

The spelling of 30112921 in words is "thirty million, one hundred twelve thousand, nine hundred twenty-one".