11121201022111 has 4 divisors (see below), whose sum is σ = 11134714025392. Its totient is φ = 11107688018832.

The previous prime is 11121201022091. The next prime is 11121201022159. The reversal of 11121201022111 is 11122010212111.

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

It is a cyclic number.

It is not a de Polignac number, because 11121201022111 - 2²³ = 11121192633503 is a prime.

It is a super-3 number, since 3×11121201022111³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121201022181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6756500406 + ... + 6756502051.

It is an arithmetic number, because the mean of its divisors is an integer number (2783678506348).

Almost surely, 2^{11121201022111} is an apocalyptic number.

11121201022111 is a deficient number, since it is larger than the sum of its proper divisors (13513003281).

11121201022111 is an equidigital number, since it uses as much as digits as its factorization.

11121201022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13513003280.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11121201022111 its reverse (11122010212111), we get a palindrome (22243211234222).

The spelling of 11121201022111 in words is "eleven trillion, one hundred twenty-one billion, two hundred one million, twenty-two thousand, one hundred eleven".