11101020122221 has 6 divisors (see below), whose sum is σ = 11716035087822. Its totient is φ = 10516755904920.

The previous prime is 11101020122161. The next prime is 11101020122261. The reversal of 11101020122221 is 12222102010111.

It can be written as a sum of positive squares in only one way, i.e., 10421242958025 + 679777164196 = 3228195^2 + 824486^2 .

It is not a de Polignac number, because 11101020122221 - 2¹¹ = 11101020120173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101020122195 and 11101020122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101020122261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15375373770 + ... + 15375374491.

It is an arithmetic number, because the mean of its divisors is an integer number (1952672514637).

Almost surely, 2^{11101020122221} is an apocalyptic number.

It is an amenable number.

11101020122221 is a deficient number, since it is larger than the sum of its proper divisors (615014965601).

11101020122221 is an equidigital number, since it uses as much as digits as its factorization.

11101020122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30750748299 (or 30750748280 counting only the distinct ones).

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

Adding to 11101020122221 its reverse (12222102010111), we get a palindrome (23323122132332).

The spelling of 11101020122221 in words is "eleven trillion, one hundred one billion, twenty million, one hundred twenty-two thousand, two hundred twenty-one".