11121020111111 has 8 divisors (see below), whose sum is σ = 11492318277264. Its totient is φ = 10754843299200.

The previous prime is 11121020111101. The next prime is 11121020111137. The reversal of 11121020111111 is 11111102012111.

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-11121020111111 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 (11121020111101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280334146 + ... + 1280342831.

It is an arithmetic number, because the mean of its divisors is an integer number (1436539784658).

Almost surely, 2^{11121020111111} is an apocalyptic number.

11121020111111 is a deficient number, since it is larger than the sum of its proper divisors (371298166153).

11121020111111 is a wasteful number, since it uses less digits than its factorization.

11121020111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560677121.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 11121020111111 its reverse (11111102012111), we get a palindrome (22232122123222).

The spelling of 11121020111111 in words is "eleven trillion, one hundred twenty-one billion, twenty million, one hundred eleven thousand, one hundred eleven".