21112093 has 2 divisors, whose sum is σ = 21112094. Its totient is φ = 21112092.

The previous prime is 21112081. The next prime is 21112103. The reversal of 21112093 is 39021112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19377604 + 1734489 = 4402^2 + 1317^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112093 - 2⁵ = 21112061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21112093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556046 + 10556047.

It is an arithmetic number, because the mean of its divisors is an integer number (10556047).

Almost surely, 2^21112093 is an apocalyptic number.

It is an amenable number.

21112093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112093 is an equidigital number, since it uses as much as digits as its factorization.

21112093 is an evil number, because the sum of its binary digits is even.

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

The square root of 21112093 is about 4594.7897666814. The cubic root of 21112093 is about 276.3824294929.

The spelling of 21112093 in words is "twenty-one million, one hundred twelve thousand, ninety-three".