11102122021 has 4 divisors (see below), whose sum is σ = 11172836332. Its totient is φ = 11031407712.

The previous prime is 11102121937. The next prime is 11102122043. The reversal of 11102122021 is 12022120111.

11102122021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12022120111 = 46051 ⋅261061.

It can be written as a sum of positive squares in 2 ways, for example, as 3694937796 + 7407184225 = 60786^2 + 86065^2 .

It is a cyclic number.

It is not a de Polignac number, because 11102122021 - 2¹⁹ = 11101597733 is a prime.

It is a super-2 number, since 2×11102122021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11102121992 and 11102122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11102122121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35356920 + ... + 35357233.

It is an arithmetic number, because the mean of its divisors is an integer number (2793209083).

Almost surely, 2^11102122021 is an apocalyptic number.

It is an amenable number.

11102122021 is a deficient number, since it is larger than the sum of its proper divisors (70714311).

11102122021 is an equidigital number, since it uses as much as digits as its factorization.

11102122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70714310.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11102122021 its reverse (12022120111), we get a palindrome (23124242132).

The spelling of 11102122021 in words is "eleven billion, one hundred two million, one hundred twenty-two thousand, twenty-one".