11101021121101 has 4 divisors (see below), whose sum is σ = 11101448619100. Its totient is φ = 11100593623104.

The previous prime is 11101021121033. The next prime is 11101021121111. The reversal of 11101021121101 is 10112112010111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 570515855625 + 10530505265476 = 755325^2 + 3245074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11101021121101 is a prime.

It is a super-2 number, since 2×11101021121101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101021121111) 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, 213710046 + ... + 213761983.

It is an arithmetic number, because the mean of its divisors is an integer number (2775362154775).

Almost surely, 2^{11101021121101} is an apocalyptic number.

It is an amenable number.

11101021121101 is a deficient number, since it is larger than the sum of its proper divisors (427497999).

11101021121101 is an equidigital number, since it uses as much as digits as its factorization.

11101021121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427497998.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11101021121101 its reverse (10112112010111), we get a palindrome (21213133131212).

The spelling of 11101021121101 in words is "eleven trillion, one hundred one billion, twenty-one million, one hundred twenty-one thousand, one hundred one".