11101221097 has 2 divisors, whose sum is σ = 11101221098. Its totient is φ = 11101221096.

The previous prime is 11101221077. The next prime is 11101221137. The reversal of 11101221097 is 79012210111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7752978601 + 3348242496 = 88051^2 + 57864^2 .

It is an emirp because it is prime and its reverse (79012210111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11101221097 - 2¹⁹ = 11100696809 is a prime.

It is not a weakly prime, because it can be changed into another prime (11101221077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550610548 + 5550610549.

It is an arithmetic number, because the mean of its divisors is an integer number (5550610549).

Almost surely, 2^11101221097 is an apocalyptic number.

It is an amenable number.

11101221097 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101221097 is an equidigital number, since it uses as much as digits as its factorization.

11101221097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 25.

The spelling of 11101221097 in words is "eleven billion, one hundred one million, two hundred twenty-one thousand, ninety-seven".