11112100121 has 4 divisors (see below), whose sum is σ = 11215951632. Its totient is φ = 11008248612.

The previous prime is 11112100091. The next prime is 11112100123. The reversal of 11112100121 is 12100121111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11112100121 - 2⁶ = 11112100057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11112100123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51925595 + ... + 51925808.

It is an arithmetic number, because the mean of its divisors is an integer number (2803987908).

Almost surely, 2^11112100121 is an apocalyptic number.

It is an amenable number.

11112100121 is a deficient number, since it is larger than the sum of its proper divisors (103851511).

11112100121 is a wasteful number, since it uses less digits than its factorization.

11112100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103851510.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11112100121 its reverse (12100121111), we get a palindrome (23212221232).

It can be divided in two parts, 111 and 12100121, that multiplied together give a palindrome (1343113431).

The spelling of 11112100121 in words is "eleven billion, one hundred twelve million, one hundred thousand, one hundred twenty-one".