111443199977 has 2 divisors, whose sum is σ = 111443199978. Its totient is φ = 111443199976.

The previous prime is 111443199953. The next prime is 111443200003. The reversal of 111443199977 is 779991344111.

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., 106889109721 + 4554090256 = 326939^2 + 67484^2 .

It is a cyclic number.

It is not a de Polignac number, because 111443199977 - 2⁶ = 111443199913 is a prime.

It is a super-2 number, since 2×111443199977² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111443199277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55721599988 + 55721599989.

It is an arithmetic number, because the mean of its divisors is an integer number (55721599989).

Almost surely, 2^111443199977 is an apocalyptic number.

It is an amenable number.

111443199977 is a deficient number, since it is larger than the sum of its proper divisors (1).

111443199977 is an equidigital number, since it uses as much as digits as its factorization.

111443199977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 56.

The spelling of 111443199977 in words is "one hundred eleven billion, four hundred forty-three million, one hundred ninety-nine thousand, nine hundred seventy-seven".