13021565061 has 8 divisors (see below), whose sum is σ = 17365722304. Its totient is φ = 8679225600.

The previous prime is 13021565059. The next prime is 13021565077. The reversal of 13021565061 is 16056512031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13021565061 - 2¹ = 13021565059 is a prime.

It is a super-2 number, since 2×13021565061² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021565861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437641 + ... + 466446.

It is an arithmetic number, because the mean of its divisors is an integer number (2170715288).

Almost surely, 2^13021565061 is an apocalyptic number.

It is an amenable number.

13021565061 is a deficient number, since it is larger than the sum of its proper divisors (4344157243).

13021565061 is an equidigital number, since it uses as much as digits as its factorization.

13021565061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908891.

The product of its (nonzero) digits is 5400, while the sum is 30.

The spelling of 13021565061 in words is "thirteen billion, twenty-one million, five hundred sixty-five thousand, sixty-one".