11102220121021 has 4 divisors (see below), whose sum is σ = 11104114380444. Its totient is φ = 11100325861600.

The previous prime is 11102220120997. The next prime is 11102220121033. The reversal of 11102220121021 is 12012102220111.

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 8879720572996 + 2222499548025 = 2979886^2 + 1490805^2 .

It is a cyclic number.

It is not a de Polignac number, because 11102220121021 - 2¹³ = 11102220112829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11102220120986 and 11102220121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11102220121061) 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, 947120920 + ... + 947132641.

It is an arithmetic number, because the mean of its divisors is an integer number (2776028595111).

Almost surely, 2^{11102220121021} is an apocalyptic number.

It is an amenable number.

11102220121021 is a deficient number, since it is larger than the sum of its proper divisors (1894259423).

11102220121021 is an equidigital number, since it uses as much as digits as its factorization.

11102220121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894259422.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11102220121021 its reverse (12012102220111), we get a palindrome (23114322341132).

The spelling of 11102220121021 in words is "eleven trillion, one hundred two billion, two hundred twenty million, one hundred twenty-one thousand, twenty-one".