21223100089 has 2 divisors, whose sum is σ = 21223100090. Its totient is φ = 21223100088.

The previous prime is 21223100077. The next prime is 21223100141. The reversal of 21223100089 is 98000132212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14256360000 + 6966740089 = 119400^2 + 83467^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223100089 - 2¹¹ = 21223098041 is a prime.

It is not a weakly prime, because it can be changed into another prime (21223100069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611550044 + 10611550045.

It is an arithmetic number, because the mean of its divisors is an integer number (10611550045).

Almost surely, 2^21223100089 is an apocalyptic number.

It is an amenable number.

21223100089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223100089 is an equidigital number, since it uses as much as digits as its factorization.

21223100089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 21223100089 in words is "twenty-one billion, two hundred twenty-three million, one hundred thousand, eighty-nine".