11112102221021 has 16 divisors (see below), whose sum is σ = 11394792298800. Its totient is φ = 10832128040448.

The previous prime is 11112102221009. The next prime is 11112102221039. The reversal of 11112102221021 is 12012220121111.

It can be written as a sum of positive squares in 8 ways, for example, as 142831084900 + 10969271136121 = 377930^2 + 3311989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11112102221021 is a prime.

It is a super-2 number, since 2×11112102221021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112102227021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119684465 + ... + 119777273.

It is an arithmetic number, because the mean of its divisors is an integer number (712174518675).

Almost surely, 2^{11112102221021} is an apocalyptic number.

It is an amenable number.

11112102221021 is a deficient number, since it is larger than the sum of its proper divisors (282690077779).

11112102221021 is a wasteful number, since it uses less digits than its factorization.

11112102221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107408.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11112102221021 its reverse (12012220121111), we get a palindrome (23124322342132).

The spelling of 11112102221021 in words is "eleven trillion, one hundred twelve billion, one hundred two million, two hundred twenty-one thousand, twenty-one".