1171312123 has 2 divisors, whose sum is σ = 1171312124. Its totient is φ = 1171312122.

The previous prime is 1171312061. The next prime is 1171312139. The reversal of 1171312123 is 3212131711.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1171312123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1171312094 and 1171312103.

It is not a weakly prime, because it can be changed into another prime (1171312193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585656061 + 585656062.

It is an arithmetic number, because the mean of its divisors is an integer number (585656062).

Almost surely, 2^1171312123 is an apocalyptic number.

1171312123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171312123 is an equidigital number, since it uses as much as digits as its factorization.

1171312123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 22.

The square root of 1171312123 is about 34224.4375118131. The cubic root of 1171312123 is about 1054.1220050034.

Adding to 1171312123 its reverse (3212131711), we get a palindrome (4383443834).

The spelling of 1171312123 in words is "one billion, one hundred seventy-one million, three hundred twelve thousand, one hundred twenty-three".