11331230857 has 2 divisors, whose sum is σ = 11331230858. Its totient is φ = 11331230856.

The previous prime is 11331230837. The next prime is 11331230879. The reversal of 11331230857 is 75803213311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10947227641 + 384003216 = 104629^2 + 19596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11331230857 is a prime.

It is not a weakly prime, because it can be changed into another prime (11331230837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665615428 + 5665615429.

It is an arithmetic number, because the mean of its divisors is an integer number (5665615429).

Almost surely, 2^11331230857 is an apocalyptic number.

It is an amenable number.

11331230857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331230857 is an equidigital number, since it uses as much as digits as its factorization.

11331230857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 11331230857 in words is "eleven billion, three hundred thirty-one million, two hundred thirty thousand, eight hundred fifty-seven".