261101113 has 24 divisors (see below), whose sum is σ = 342154368. Its totient is φ = 194418432.

The previous prime is 261101063. The next prime is 261101131. The reversal of 261101113 is 311101162.

It is not a de Polignac number, because 261101113 - 2¹⁷ = 260970041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261101143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13620 + ... + 26602.

It is an arithmetic number, because the mean of its divisors is an integer number (14256432).

Almost surely, 2^261101113 is an apocalyptic number.

It is an amenable number.

261101113 is a deficient number, since it is larger than the sum of its proper divisors (81053255).

261101113 is a wasteful number, since it uses less digits than its factorization.

261101113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13033 (or 13020 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 261101113 is about 16158.6234871662. The cubic root of 261101113 is about 639.1501684273.

Adding to 261101113 its reverse (311101162), we get a palindrome (572202275).

The spelling of 261101113 in words is "two hundred sixty-one million, one hundred one thousand, one hundred thirteen".