11221221101 has 2 divisors, whose sum is σ = 11221221102. Its totient is φ = 11221221100.

The previous prime is 11221221097. The next prime is 11221221103. The reversal of 11221221101 is 10112212211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7270972900 + 3950248201 = 85270^2 + 62851^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221221101 - 2² = 11221221097 is a prime.

Together with 11221221103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221221103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610610550 + 5610610551.

It is an arithmetic number, because the mean of its divisors is an integer number (5610610551).

Almost surely, 2^11221221101 is an apocalyptic number.

It is an amenable number.

11221221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221221101 is an equidigital number, since it uses as much as digits as its factorization.

11221221101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11221221101 its reverse (10112212211), we get a palindrome (21333433312).

The spelling of 11221221101 in words is "eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred one".