11271212143 has 16 divisors (see below), whose sum is σ = 12047400000. Its totient is φ = 10508078592.

The previous prime is 11271212119. The next prime is 11271212189. The reversal of 11271212143 is 34121217211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11271212143 - 2⁹ = 11271211631 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 (11271213143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 767433 + ... + 781981.

It is an arithmetic number, because the mean of its divisors is an integer number (752962500).

Almost surely, 2^11271212143 is an apocalyptic number.

11271212143 is a deficient number, since it is larger than the sum of its proper divisors (776187857).

11271212143 is a wasteful number, since it uses less digits than its factorization.

11271212143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14994.

The product of its digits is 672, while the sum is 25.

Adding to 11271212143 its reverse (34121217211), we get a palindrome (45392429354).

The spelling of 11271212143 in words is "eleven billion, two hundred seventy-one million, two hundred twelve thousand, one hundred forty-three".