21310130195 has 4 divisors (see below), whose sum is σ = 25572156240. Its totient is φ = 17048104152.

The previous prime is 21310130183. The next prime is 21310130239. The reversal of 21310130195 is 59103101312.

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

It is a cyclic number.

It is not a de Polignac number, because 21310130195 - 2¹⁰ = 21310129171 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2131013015 + ... + 2131013024.

It is an arithmetic number, because the mean of its divisors is an integer number (6393039060).

Almost surely, 2^21310130195 is an apocalyptic number.

21310130195 is a deficient number, since it is larger than the sum of its proper divisors (4262026045).

21310130195 is an equidigital number, since it uses as much as digits as its factorization.

21310130195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262026044.

The product of its (nonzero) digits is 810, while the sum is 26.

The spelling of 21310130195 in words is "twenty-one billion, three hundred ten million, one hundred thirty thousand, one hundred ninety-five".