1101206815897 has 2 divisors, whose sum is σ = 1101206815898. Its totient is φ = 1101206815896.

The previous prime is 1101206815847. The next prime is 1101206815927. The reversal of 1101206815897 is 7985186021011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1038974528601 + 62232287296 = 1019301^2 + 249464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101206815897 - 2¹¹ = 1101206813849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1101206815897.

It is not a weakly prime, because it can be changed into another prime (1101206815847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550603407948 + 550603407949.

It is an arithmetic number, because the mean of its divisors is an integer number (550603407949).

Almost surely, 2^{1101206815897} is an apocalyptic number.

It is an amenable number.

1101206815897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101206815897 is an equidigital number, since it uses as much as digits as its factorization.

1101206815897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 49.

The spelling of 1101206815897 in words is "one trillion, one hundred one billion, two hundred six million, eight hundred fifteen thousand, eight hundred ninety-seven".