11123111011211 has 8 divisors (see below), whose sum is σ = 11306173743984. Its totient is φ = 10940071396320.

The previous prime is 11123111011139. The next prime is 11123111011237. The reversal of 11123111011211 is 11211011132111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11123111011211 is a prime.

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 11123111011211.

It is not an unprimeable number, because it can be changed into a prime (11123111011511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4807925 + ... + 6735158.

It is an arithmetic number, because the mean of its divisors is an integer number (1413271717998).

Almost surely, 2^{11123111011211} is an apocalyptic number.

11123111011211 is a deficient number, since it is larger than the sum of its proper divisors (183062732773).

11123111011211 is a wasteful number, since it uses less digits than its factorization.

11123111011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11558941.

The product of its (nonzero) digits is 12, while the sum is 17.

Adding to 11123111011211 its reverse (11211011132111), we get a palindrome (22334122143322).

The spelling of 11123111011211 in words is "eleven trillion, one hundred twenty-three billion, one hundred eleven million, eleven thousand, two hundred eleven".