21520003022099 has 2 divisors, whose sum is σ = 21520003022100. Its totient is φ = 21520003022098.

The previous prime is 21520003022071. The next prime is 21520003022191. The reversal of 21520003022099 is 99022030002512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21520003022099 - 2⁸ = 21520003021843 is a prime.

It is a super-2 number, since 2×21520003022099² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21520003022009) 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, 10760001511049 + 10760001511050.

It is an arithmetic number, because the mean of its divisors is an integer number (10760001511050).

Almost surely, 2^{21520003022099} is an apocalyptic number.

21520003022099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21520003022099 is an equidigital number, since it uses as much as digits as its factorization.

21520003022099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 21520003022099 in words is "twenty-one trillion, five hundred twenty billion, three million, twenty-two thousand, ninety-nine".