21123313060009 has 2 divisors, whose sum is σ = 21123313060010. Its totient is φ = 21123313060008.

The previous prime is 21123313059971. The next prime is 21123313060061. The reversal of 21123313060009 is 90006031332112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18705599050009 + 2417714010000 = 4324997^2 + 1554900^2 .

It is a cyclic number.

It is not a de Polignac number, because 21123313060009 - 2²⁵ = 21123279505577 is a prime.

It is a super-2 number, since 2×21123313060009² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21123313060099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561656530004 + 10561656530005.

It is an arithmetic number, because the mean of its divisors is an integer number (10561656530005).

Almost surely, 2^{21123313060009} is an apocalyptic number.

It is an amenable number.

21123313060009 is a deficient number, since it is larger than the sum of its proper divisors (1).

21123313060009 is an equidigital number, since it uses as much as digits as its factorization.

21123313060009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 21123313060009 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred thirteen million, sixty thousand, nine".