261421121132713 has 8 divisors (see below), whose sum is σ = 261446120409600. Its totient is φ = 261396122674128.

The previous prime is 261421121132681. The next prime is 261421121132723. The reversal of 261421121132713 is 317231121124162.

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

It is a cyclic number.

It is not a de Polignac number, because 261421121132713 - 2⁵ = 261421121132681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261421121132723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774772920 + ... + 775110262.

It is an arithmetic number, because the mean of its divisors is an integer number (32680765051200).

Almost surely, 2^{261421121132713} is an apocalyptic number.

It is an amenable number.

261421121132713 is a deficient number, since it is larger than the sum of its proper divisors (24999276887).

261421121132713 is a wasteful number, since it uses less digits than its factorization.

261421121132713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409151.

The product of its digits is 24192, while the sum is 37.

Adding to 261421121132713 its reverse (317231121124162), we get a palindrome (578652242256875).

The spelling of 261421121132713 in words is "two hundred sixty-one trillion, four hundred twenty-one billion, one hundred twenty-one million, one hundred thirty-two thousand, seven hundred thirteen".