21120211093 has 2 divisors, whose sum is σ = 21120211094. Its totient is φ = 21120211092.

The previous prime is 21120211051. The next prime is 21120211181. The reversal of 21120211093 is 39011202112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13012649329 + 8107561764 = 114073^2 + 90042^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120211093 - 2²⁹ = 20583340181 is a prime.

It is a super-2 number, since 2×21120211093² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120211003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560105546 + 10560105547.

It is an arithmetic number, because the mean of its divisors is an integer number (10560105547).

Almost surely, 2^21120211093 is an apocalyptic number.

It is an amenable number.

21120211093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120211093 is an equidigital number, since it uses as much as digits as its factorization.

21120211093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 21120211093 in words is "twenty-one billion, one hundred twenty million, two hundred eleven thousand, ninety-three".