11205311261 has 8 divisors (see below), whose sum is σ = 11238072384. Its totient is φ = 11172582720.

The previous prime is 11205311233. The next prime is 11205311263. The reversal of 11205311261 is 16211350211.

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 11205311261 - 2¹⁸ = 11205049117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11205311263) 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, 792746 + ... + 806756.

It is an arithmetic number, because the mean of its divisors is an integer number (1404759048).

Almost surely, 2^11205311261 is an apocalyptic number.

It is an amenable number.

11205311261 is a deficient number, since it is larger than the sum of its proper divisors (32761123).

11205311261 is a wasteful number, since it uses less digits than its factorization.

11205311261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16291.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 11205311261 its reverse (16211350211), we get a palindrome (27416661472).

The spelling of 11205311261 in words is "eleven billion, two hundred five million, three hundred eleven thousand, two hundred sixty-one".