11121112212101 has 4 divisors (see below), whose sum is σ = 11149701189900. Its totient is φ = 11092523234304.

The previous prime is 11121112212073. The next prime is 11121112212109. The reversal of 11121112212101 is 10121221112111.

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 2692257456100 + 8428854756001 = 1640810^2 + 2903249^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121112212101 - 2⁴² = 6723065700997 is a prime.

It is a super-2 number, since 2×11121112212101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11121112212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121112212109) 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, 14294488316 + ... + 14294489093.

It is an arithmetic number, because the mean of its divisors is an integer number (2787425297475).

Almost surely, 2^{11121112212101} is an apocalyptic number.

It is an amenable number.

11121112212101 is a deficient number, since it is larger than the sum of its proper divisors (28588977799).

11121112212101 is an equidigital number, since it uses as much as digits as its factorization.

11121112212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28588977798.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11121112212101 its reverse (10121221112111), we get a palindrome (21242333324212).

The spelling of 11121112212101 in words is "eleven trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, one hundred one".