11320121111 has 4 divisors (see below), whose sum is σ = 12190899672. Its totient is φ = 10449342552.

The previous prime is 11320121101. The next prime is 11320121129. The reversal of 11320121111 is 11112102311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11320121111 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 (11320121101) 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 3 ways as a sum of consecutive naturals, for example, 435389261 + ... + 435389286.

It is an arithmetic number, because the mean of its divisors is an integer number (3047724918).

Almost surely, 2^11320121111 is an apocalyptic number.

11320121111 is a deficient number, since it is larger than the sum of its proper divisors (870778561).

11320121111 is an equidigital number, since it uses as much as digits as its factorization.

11320121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870778560.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11320121111 its reverse (11112102311), we get a palindrome (22432223422).

The spelling of 11320121111 in words is "eleven billion, three hundred twenty million, one hundred twenty-one thousand, one hundred eleven".