11100121101 has 24 divisors (see below), whose sum is σ = 16868497464. Its totient is φ = 7024458240.

The previous prime is 11100121061. The next prime is 11100121121. The reversal of 11100121101 is 10112100111.

It can be written as a sum of positive squares in 4 ways, for example, as 3733332201 + 7366788900 = 61101^2 + 85830^2 .

It is not a de Polignac number, because 11100121101 - 2⁶ = 11100121037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100121121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392856 + ... + 420161.

It is an arithmetic number, because the mean of its divisors is an integer number (702854061).

Almost surely, 2^11100121101 is an apocalyptic number.

It is an amenable number.

11100121101 is a deficient number, since it is larger than the sum of its proper divisors (5768376363).

11100121101 is a wasteful number, since it uses less digits than its factorization.

11100121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813101 (or 813098 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11100121101 its reverse (10112100111), we get a palindrome (21212221212).

The spelling of 11100121101 in words is "eleven billion, one hundred million, one hundred twenty-one thousand, one hundred one".