11121211100111 has 8 divisors (see below), whose sum is σ = 12969342391200. Its totient is φ = 9532466656944.

The previous prime is 11121211100101. The next prime is 11121211100141. The reversal of 11121211100111 is 11100111212111.

It is not a de Polignac number, because 11121211100111 - 2⁴² = 6723164589007 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 (11121211100101) 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, 16211677646 + ... + 16211678331.

It is an arithmetic number, because the mean of its divisors is an integer number (1621167798900).

Almost surely, 2^{11121211100111} is an apocalyptic number.

11121211100111 is a deficient number, since it is larger than the sum of its proper divisors (1848131291089).

11121211100111 is an frugal number, since it uses more digits than its factorization.

11121211100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32423355998 (or 32423355984 counting only the distinct ones).

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

Adding to 11121211100111 its reverse (11100111212111), we get a palindrome (22221322312222).

The spelling of 11121211100111 in words is "eleven trillion, one hundred twenty-one billion, two hundred eleven million, one hundred thousand, one hundred eleven".