130721086669 has 4 divisors (see below), whose sum is σ = 130751512444. Its totient is φ = 130690660896.

The previous prime is 130721086609. The next prime is 130721086681. The reversal of 130721086669 is 966680127031.

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 55993756900 + 74727329769 = 236630^2 + 273363^2 .

It is a cyclic number.

It is not a de Polignac number, because 130721086669 - 2¹⁷ = 130720955597 is a prime.

It is a super-2 number, since 2×130721086669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130721086609) 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, 15206442 + ... + 15215035.

It is an arithmetic number, because the mean of its divisors is an integer number (32687878111).

Almost surely, 2^130721086669 is an apocalyptic number.

It is an amenable number.

130721086669 is a deficient number, since it is larger than the sum of its proper divisors (30425775).

130721086669 is an equidigital number, since it uses as much as digits as its factorization.

130721086669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30425774.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 130721086669 in words is "one hundred thirty billion, seven hundred twenty-one million, eighty-six thousand, six hundred sixty-nine".