130821102865 has 4 divisors (see below), whose sum is σ = 156985323444. Its totient is φ = 104656882288.

The previous prime is 130821102859. The next prime is 130821102889. The reversal of 130821102865 is 568201128031.

It is a Cunningham number, because it is equal to 361692²+1.

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 47095944256 + 83725158609 = 217016^2 + 289353^2 .

It is a cyclic number.

It is not a de Polignac number, because 130821102865 - 2¹⁷ = 130820971793 is a prime.

It is a super-2 number, since 2×130821102865² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13082110282 + ... + 13082110291.

It is an arithmetic number, because the mean of its divisors is an integer number (39246330861).

Almost surely, 2^130821102865 is an apocalyptic number.

It is an amenable number.

130821102865 is a deficient number, since it is larger than the sum of its proper divisors (26164220579).

130821102865 is an equidigital number, since it uses as much as digits as its factorization.

130821102865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26164220578.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 130821102865 in words is "one hundred thirty billion, eight hundred twenty-one million, one hundred two thousand, eight hundred sixty-five".