11101032221 has 2 divisors, whose sum is σ = 11101032222. Its totient is φ = 11101032220.

The previous prime is 11101032157. The next prime is 11101032227. The reversal of 11101032221 is 12223010111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10839724996 + 261307225 = 104114^2 + 16165^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101032221 - 2⁶ = 11101032157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11101032196 and 11101032205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101032227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550516110 + 5550516111.

It is an arithmetic number, because the mean of its divisors is an integer number (5550516111).

Almost surely, 2^11101032221 is an apocalyptic number.

It is an amenable number.

11101032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101032221 is an equidigital number, since it uses as much as digits as its factorization.

11101032221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11101032221 its reverse (12223010111), we get a palindrome (23324042332).

The spelling of 11101032221 in words is "eleven billion, one hundred one million, thirty-two thousand, two hundred twenty-one".