111123446947 has 2 divisors, whose sum is σ = 111123446948. Its totient is φ = 111123446946.

The previous prime is 111123446887. The next prime is 111123446989. The reversal of 111123446947 is 749644321111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111123446947 - 2¹¹ = 111123444899 is a prime.

It is a super-2 number, since 2×111123446947² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111123446747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561723473 + 55561723474.

It is an arithmetic number, because the mean of its divisors is an integer number (55561723474).

Almost surely, 2^111123446947 is an apocalyptic number.

111123446947 is a deficient number, since it is larger than the sum of its proper divisors (1).

111123446947 is an equidigital number, since it uses as much as digits as its factorization.

111123446947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The spelling of 111123446947 in words is "one hundred eleven billion, one hundred twenty-three million, four hundred forty-six thousand, nine hundred forty-seven".