111238892857 has 2 divisors, whose sum is σ = 111238892858. Its totient is φ = 111238892856.

The previous prime is 111238892851. The next prime is 111238892881. The reversal of 111238892857 is 758298832111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102397440016 + 8841452841 = 319996^2 + 94029^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111238892857 is a prime.

It is a super-2 number, since 2×111238892857² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111238892798 and 111238892807.

It is not a weakly prime, because it can be changed into another prime (111238892851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55619446428 + 55619446429.

It is an arithmetic number, because the mean of its divisors is an integer number (55619446429).

Almost surely, 2^111238892857 is an apocalyptic number.

It is an amenable number.

111238892857 is a deficient number, since it is larger than the sum of its proper divisors (1).

111238892857 is an equidigital number, since it uses as much as digits as its factorization.

111238892857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 55.

The spelling of 111238892857 in words is "one hundred eleven billion, two hundred thirty-eight million, eight hundred ninety-two thousand, eight hundred fifty-seven".