2021021200117 has 2 divisors, whose sum is σ = 2021021200118. Its totient is φ = 2021021200116.

The previous prime is 2021021200109. The next prime is 2021021200127. The reversal of 2021021200117 is 7110021201202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1670114244241 + 350906955876 = 1292329^2 + 592374^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021021200117 - 2³ = 2021021200109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021021200094 and 2021021200103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021021200127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010510600058 + 1010510600059.

It is an arithmetic number, because the mean of its divisors is an integer number (1010510600059).

Almost surely, 2^{2021021200117} is an apocalyptic number.

It is an amenable number.

2021021200117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021021200117 is an equidigital number, since it uses as much as digits as its factorization.

2021021200117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 2021021200117 its reverse (7110021201202), we get a palindrome (9131042401319).

The spelling of 2021021200117 in words is "two trillion, twenty-one billion, twenty-one million, two hundred thousand, one hundred seventeen".