11216191993 has 2 divisors, whose sum is σ = 11216191994. Its totient is φ = 11216191992.

The previous prime is 11216191957. The next prime is 11216191999. The reversal of 11216191993 is 39919161211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6951057129 + 4265134864 = 83373^2 + 65308^2 .

It is a cyclic number.

It is not a de Polignac number, because 11216191993 - 2²¹ = 11214094841 is a prime.

It is not a weakly prime, because it can be changed into another prime (11216191999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5608095996 + 5608095997.

It is an arithmetic number, because the mean of its divisors is an integer number (5608095997).

Almost surely, 2^11216191993 is an apocalyptic number.

It is an amenable number.

11216191993 is a deficient number, since it is larger than the sum of its proper divisors (1).

11216191993 is an equidigital number, since it uses as much as digits as its factorization.

11216191993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 43.

The spelling of 11216191993 in words is "eleven billion, two hundred sixteen million, one hundred ninety-one thousand, nine hundred ninety-three".