1231112144677 has 2 divisors, whose sum is σ = 1231112144678. Its totient is φ = 1231112144676.

The previous prime is 1231112144573. The next prime is 1231112144681. The reversal of 1231112144677 is 7764412111321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1230160483876 + 951660801 = 1109126^2 + 30849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231112144677 is a prime.

It is a super-2 number, since 2×1231112144677² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231112144177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615556072338 + 615556072339.

It is an arithmetic number, because the mean of its divisors is an integer number (615556072339).

Almost surely, 2^{1231112144677} is an apocalyptic number.

It is an amenable number.

1231112144677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231112144677 is an equidigital number, since it uses as much as digits as its factorization.

1231112144677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

Adding to 1231112144677 its reverse (7764412111321), we get a palindrome (8995524255998).

The spelling of 1231112144677 in words is "one trillion, two hundred thirty-one billion, one hundred twelve million, one hundred forty-four thousand, six hundred seventy-seven".