10111220897 has 2 divisors, whose sum is σ = 10111220898. Its totient is φ = 10111220896.

The previous prime is 10111220893. The next prime is 10111220929. The reversal of 10111220897 is 79802211101.

It is an a-pointer prime, because the next prime (10111220929) can be obtained adding 10111220897 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10007201296 + 104019601 = 100036^2 + 10199^2 .

It is an emirp because it is prime and its reverse (79802211101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10111220897 - 2² = 10111220893 is a prime.

It is not a weakly prime, because it can be changed into another prime (10111220893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055610448 + 5055610449.

It is an arithmetic number, because the mean of its divisors is an integer number (5055610449).

Almost surely, 2^10111220897 is an apocalyptic number.

It is an amenable number.

10111220897 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111220897 is an equidigital number, since it uses as much as digits as its factorization.

10111220897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 32.

Adding to 10111220897 its reverse (79802211101), we get a palindrome (89913431998).

The spelling of 10111220897 in words is "ten billion, one hundred eleven million, two hundred twenty thousand, eight hundred ninety-seven".