21120021120089 has 2 divisors, whose sum is σ = 21120021120090. Its totient is φ = 21120021120088.

The previous prime is 21120021120043. The next prime is 21120021120103. The reversal of 21120021120089 is 98002112002112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19639255824400 + 1480765295689 = 4431620^2 + 1216867^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120021120089 - 2⁸ = 21120021119833 is a prime.

It is a super-2 number, since 2×21120021120089² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21120021120019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560010560044 + 10560010560045.

It is an arithmetic number, because the mean of its divisors is an integer number (10560010560045).

Almost surely, 2^{21120021120089} is an apocalyptic number.

It is an amenable number.

21120021120089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120021120089 is an equidigital number, since it uses as much as digits as its factorization.

21120021120089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 21120021120089 in words is "twenty-one trillion, one hundred twenty billion, twenty-one million, one hundred twenty thousand, eighty-nine".