11261771201 has 4 divisors (see below), whose sum is σ = 11262914004. Its totient is φ = 11260628400.

The previous prime is 11261771161. The next prime is 11261771203. The reversal of 11261771201 is 10217716211.

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 388287025 + 10873484176 = 19705^2 + 104276^2 .

It is a cyclic number.

It is not a de Polignac number, because 11261771201 - 2²⁶ = 11194662337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11261771203) 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, 556490 + ... + 576371.

It is an arithmetic number, because the mean of its divisors is an integer number (2815728501).

Almost surely, 2^11261771201 is an apocalyptic number.

It is an amenable number.

11261771201 is a deficient number, since it is larger than the sum of its proper divisors (1142803).

11261771201 is an equidigital number, since it uses as much as digits as its factorization.

11261771201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142802.

The product of its (nonzero) digits is 1176, while the sum is 29.

The spelling of 11261771201 in words is "eleven billion, two hundred sixty-one million, seven hundred seventy-one thousand, two hundred one".