11221123311 has 24 divisors (see below), whose sum is σ = 16752456864. Its totient is φ = 7232172480.

The previous prime is 11221123307. The next prime is 11221123313. The reversal of 11221123311 is 11332112211.

11221123311 is a `hidden beast` number, since 11 + 221 + 123 + 311 = 666.

It is not a de Polignac number, because 11221123311 - 2² = 11221123307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221123313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55035 + ... + 159596.

It is an arithmetic number, because the mean of its divisors is an integer number (698019036).

Almost surely, 2^11221123311 is an apocalyptic number.

11221123311 is a deficient number, since it is larger than the sum of its proper divisors (5531333553).

11221123311 is a wasteful number, since it uses less digits than its factorization.

11221123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214831 (or 214828 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11221123311 its reverse (11332112211), we get a palindrome (22553235522).

The spelling of 11221123311 in words is "eleven billion, two hundred twenty-one million, one hundred twenty-three thousand, three hundred eleven".