111231133331977 has 2 divisors, whose sum is σ = 111231133331978. Its totient is φ = 111231133331976.

The previous prime is 111231133331947. The next prime is 111231133331987. The reversal of 111231133331977 is 779133331132111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102921917761936 + 8309215570041 = 10145044^2 + 2882571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111231133331977 is a prime.

It is not a weakly prime, because it can be changed into another prime (111231133331917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615566665988 + 55615566665989.

It is an arithmetic number, because the mean of its divisors is an integer number (55615566665989).

Almost surely, 2^{111231133331977} is an apocalyptic number.

It is an amenable number.

111231133331977 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231133331977 is an equidigital number, since it uses as much as digits as its factorization.

111231133331977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 214326, while the sum is 46.

The spelling of 111231133331977 in words is "one hundred eleven trillion, two hundred thirty-one billion, one hundred thirty-three million, three hundred thirty-one thousand, nine hundred seventy-seven".