11206127881 has 27 divisors (see below), whose sum is σ = 12917191701. Its totient is φ = 9715315584.

The previous prime is 11206127839. The next prime is 11206127897. The reversal of 11206127881 is 18872160211.

The square root of 11206127881 is 105859.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 101183481 + 11104944400 = 10059^2 + 105380^2 .

It is not a de Polignac number, because 11206127881 - 2⁷ = 11206127753 is a prime.

It is a super-2 number, since 2×11206127881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11206127881.

It is not an unprimeable number, because it can be changed into a prime (11206127081) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 23394600 + ... + 23395078.

Almost surely, 2^11206127881 is an apocalyptic number.

11206127881 is the 105859-th square number.

11206127881 is the 52930-th centered octagonal number.

It is an amenable number.

11206127881 is a deficient number, since it is larger than the sum of its proper divisors (1711063820).

11206127881 is an frugal number, since it uses more digits than its factorization.

11206127881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 37.

The spelling of 11206127881 in words is "eleven billion, two hundred six million, one hundred twenty-seven thousand, eight hundred eighty-one".