11211321097 has 2 divisors, whose sum is σ = 11211321098. Its totient is φ = 11211321096.

The previous prime is 11211321083. The next prime is 11211321131. The reversal of 11211321097 is 79012311211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7027301241 + 4184019856 = 83829^2 + 64684^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211321097 - 2²⁷ = 11077103369 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211321047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605660548 + 5605660549.

It is an arithmetic number, because the mean of its divisors is an integer number (5605660549).

Almost surely, 2^11211321097 is an apocalyptic number.

It is an amenable number.

11211321097 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211321097 is an equidigital number, since it uses as much as digits as its factorization.

11211321097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 28.

The spelling of 11211321097 in words is "eleven billion, two hundred eleven million, three hundred twenty-one thousand, ninety-seven".