11220020897 has 2 divisors, whose sum is σ = 11220020898. Its totient is φ = 11220020896.

The previous prime is 11220020879. The next prime is 11220020971. The reversal of 11220020897 is 79802002211.

It is a happy number.

Together with previous prime (11220020879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5814977536 + 5405043361 = 76256^2 + 73519^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220020897 - 2¹⁴ = 11220004513 is a prime.

It is not a weakly prime, because it can be changed into another prime (11220020197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610010448 + 5610010449.

It is an arithmetic number, because the mean of its divisors is an integer number (5610010449).

Almost surely, 2^11220020897 is an apocalyptic number.

It is an amenable number.

11220020897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220020897 is an equidigital number, since it uses as much as digits as its factorization.

11220020897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 11220020897 in words is "eleven billion, two hundred twenty million, twenty thousand, eight hundred ninety-seven".