210002112020105 has 4 divisors (see below), whose sum is σ = 252002534424132. Its totient is φ = 168001689616080.

The previous prime is 210002112020101. The next prime is 210002112020117. The reversal of 210002112020105 is 501020211200012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45411789335929 + 164590322684176 = 6738827^2 + 12829276^2 .

It is not a de Polignac number, because 210002112020105 - 2² = 210002112020101 is a prime.

It is a super-2 number, since 2×210002112020105² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210002112020101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21000211202006 + ... + 21000211202015.

It is an arithmetic number, because the mean of its divisors is an integer number (63000633606033).

Almost surely, 2^{210002112020105} is an apocalyptic number.

It is an amenable number.

210002112020105 is a deficient number, since it is larger than the sum of its proper divisors (42000422404027).

210002112020105 is an equidigital number, since it uses as much as digits as its factorization.

210002112020105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42000422404026.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 210002112020105 its reverse (501020211200012), we get a palindrome (711022323220117).

The spelling of 210002112020105 in words is "two hundred ten trillion, two billion, one hundred twelve million, twenty thousand, one hundred five".