11121001011111 has 4 divisors (see below), whose sum is σ = 14828001348152. Its totient is φ = 7414000674072.

The previous prime is 11121001011067. The next prime is 11121001011119. The reversal of 11121001011111 is 11111010012111.

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

It is not a de Polignac number, because 11121001011111 - 2⁷ = 11121001010983 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 (11121001011119) 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, 1853500168516 + ... + 1853500168521.

It is an arithmetic number, because the mean of its divisors is an integer number (3707000337038).

Almost surely, 2^{11121001011111} is an apocalyptic number.

11121001011111 is a deficient number, since it is larger than the sum of its proper divisors (3707000337041).

11121001011111 is an equidigital number, since it uses as much as digits as its factorization.

11121001011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707000337040.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 11121001011111 its reverse (11111010012111), we get a palindrome (22232011023222).

The spelling of 11121001011111 in words is "eleven trillion, one hundred twenty-one billion, one million, eleven thousand, one hundred eleven".