210510130121105 has 4 divisors (see below), whose sum is σ = 252612156145332. Its totient is φ = 168408104096880.

The previous prime is 210510130121087. The next prime is 210510130121107. The reversal of 210510130121105 is 501121031015012.

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 145554283609744 + 64955846511361 = 12064588^2 + 8059519^2 .

It is not a de Polignac number, because 210510130121105 - 2³⁶ = 210441410644369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210510130121107) 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, 21051013012106 + ... + 21051013012115.

It is an arithmetic number, because the mean of its divisors is an integer number (63153039036333).

Almost surely, 2^{210510130121105} is an apocalyptic number.

It is an amenable number.

210510130121105 is a deficient number, since it is larger than the sum of its proper divisors (42102026024227).

210510130121105 is an equidigital number, since it uses as much as digits as its factorization.

210510130121105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42102026024226.

The product of its (nonzero) digits is 300, while the sum is 23.

Adding to 210510130121105 its reverse (501121031015012), we get a palindrome (711631161136117).

The spelling of 210510130121105 in words is "two hundred ten trillion, five hundred ten billion, one hundred thirty million, one hundred twenty-one thousand, one hundred five".