11243210857 has 2 divisors, whose sum is σ = 11243210858. Its totient is φ = 11243210856.

The previous prime is 11243210827. The next prime is 11243210963. The reversal of 11243210857 is 75801234211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10765307536 + 477903321 = 103756^2 + 21861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11243210857 is a prime.

It is not a weakly prime, because it can be changed into another prime (11243210827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5621605428 + 5621605429.

It is an arithmetic number, because the mean of its divisors is an integer number (5621605429).

Almost surely, 2^11243210857 is an apocalyptic number.

It is an amenable number.

11243210857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11243210857 is an equidigital number, since it uses as much as digits as its factorization.

11243210857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 11243210857 in words is "eleven billion, two hundred forty-three million, two hundred ten thousand, eight hundred fifty-seven".