210021010117 has 2 divisors, whose sum is σ = 210021010118. Its totient is φ = 210021010116.

The previous prime is 210021010097. The next prime is 210021010127. The reversal of 210021010117 is 711010120012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126565889121 + 83455120996 = 355761^2 + 288886^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021010117 - 2¹⁵ = 210020977349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210021010117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210021010127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010505058 + 105010505059.

It is an arithmetic number, because the mean of its divisors is an integer number (105010505059).

Almost surely, 2^210021010117 is an apocalyptic number.

It is an amenable number.

210021010117 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021010117 is an equidigital number, since it uses as much as digits as its factorization.

210021010117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 210021010117 its reverse (711010120012), we get a palindrome (921031130129).

The spelling of 210021010117 in words is "two hundred ten billion, twenty-one million, ten thousand, one hundred seventeen".