11221555143 has 16 divisors (see below), whose sum is σ = 15869226240. Its totient is φ = 7028962176.

The previous prime is 11221555127. The next prime is 11221555151. The reversal of 11221555143 is 34155512211.

It is not a de Polignac number, because 11221555143 - 2⁴ = 11221555127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11221555143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221555193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157483 + ... + 217356.

It is an arithmetic number, because the mean of its divisors is an integer number (991826640).

Almost surely, 2^11221555143 is an apocalyptic number.

11221555143 is a deficient number, since it is larger than the sum of its proper divisors (4647671097).

11221555143 is a wasteful number, since it uses less digits than its factorization.

11221555143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375446.

The product of its digits is 6000, while the sum is 30.

The spelling of 11221555143 in words is "eleven billion, two hundred twenty-one million, five hundred fifty-five thousand, one hundred forty-three".