21313002123163 has 2 divisors, whose sum is σ = 21313002123164. Its totient is φ = 21313002123162.

The previous prime is 21313002123121. The next prime is 21313002123173. The reversal of 21313002123163 is 36132120031312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21313002123163 - 2¹⁷ = 21313001992091 is a prime.

It is a super-2 number, since 2×21313002123163² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21313002123173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656501061581 + 10656501061582.

It is an arithmetic number, because the mean of its divisors is an integer number (10656501061582).

Almost surely, 2^{21313002123163} is an apocalyptic number.

21313002123163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313002123163 is an equidigital number, since it uses as much as digits as its factorization.

21313002123163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 21313002123163 its reverse (36132120031312), we get a palindrome (57445122154475).

The spelling of 21313002123163 in words is "twenty-one trillion, three hundred thirteen billion, two million, one hundred twenty-three thousand, one hundred sixty-three".