1172120071 has 2 divisors, whose sum is σ = 1172120072. Its totient is φ = 1172120070.

The previous prime is 1172120023. The next prime is 1172120099. The reversal of 1172120071 is 1700212711.

It is a strong prime.

It is an emirp because it is prime and its reverse (1700212711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1172120071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1172120021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586060035 + 586060036.

It is an arithmetic number, because the mean of its divisors is an integer number (586060036).

Almost surely, 2^1172120071 is an apocalyptic number.

1172120071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172120071 is an equidigital number, since it uses as much as digits as its factorization.

1172120071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196, while the sum is 22.

The square root of 1172120071 is about 34236.2391480139. The cubic root of 1172120071 is about 1054.3643201532.

Adding to 1172120071 its reverse (1700212711), we get a palindrome (2872332782).

The spelling of 1172120071 in words is "one billion, one hundred seventy-two million, one hundred twenty thousand, seventy-one".