11243221999 has 2 divisors, whose sum is σ = 11243222000. Its totient is φ = 11243221998.

The previous prime is 11243221943. The next prime is 11243222063. The reversal of 11243221999 is 99912234211.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11243221999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11243221919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5621610999 + 5621611000.

It is an arithmetic number, because the mean of its divisors is an integer number (5621611000).

Almost surely, 2^11243221999 is an apocalyptic number.

11243221999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11243221999 is an equidigital number, since it uses as much as digits as its factorization.

11243221999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

It can be divided in two parts, 112432 and 21999, that added together give a palindrome (134431).

The spelling of 11243221999 in words is "eleven billion, two hundred forty-three million, two hundred twenty-one thousand, nine hundred ninety-nine".