5500005500021 has 2 divisors, whose sum is σ = 5500005500022. Its totient is φ = 5500005500020.

The previous prime is 5500005500009. The next prime is 5500005500107. The reversal of 5500005500021 is 1200055000055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2953204443121 + 2546801056900 = 1718489^2 + 1595870^2 .

It is a cyclic number.

It is not a de Polignac number, because 5500005500021 - 2⁶ = 5500005499957 is a prime.

It is a super-2 number, since 2×5500005500021² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5500005500021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5500005500621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750002750010 + 2750002750011.

It is an arithmetic number, because the mean of its divisors is an integer number (2750002750011).

Almost surely, 2^{5500005500021} is an apocalyptic number.

It is an amenable number.

5500005500021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5500005500021 is an equidigital number, since it uses as much as digits as its factorization.

5500005500021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1250, while the sum is 23.

The spelling of 5500005500021 in words is "five trillion, five hundred billion, five million, five hundred thousand, twenty-one".