11121221000101 has 4 divisors (see below), whose sum is σ = 11148412249900. Its totient is φ = 11094029750304.

The previous prime is 11121221000063. The next prime is 11121221000161. The reversal of 11121221000101 is 10100012212111.

It is a happy number.

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 8144026043076 + 2977194957025 = 2853774^2 + 1725455^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121221000101 - 2¹¹ = 11121220998053 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 (11121221000161) 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, 13595624286 + ... + 13595625103.

It is an arithmetic number, because the mean of its divisors is an integer number (2787103062475).

Almost surely, 2^{11121221000101} is an apocalyptic number.

It is an amenable number.

11121221000101 is a deficient number, since it is larger than the sum of its proper divisors (27191249799).

11121221000101 is an equidigital number, since it uses as much as digits as its factorization.

11121221000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27191249798.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11121221000101 its reverse (10100012212111), we get a palindrome (21221233212212).

The spelling of 11121221000101 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred one", and thus it is an aban number.