1187165232101 has 2 divisors, whose sum is σ = 1187165232102. Its totient is φ = 1187165232100.

The previous prime is 1187165231971. The next prime is 1187165232151. The reversal of 1187165232101 is 1012325617811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 745969053025 + 441196179076 = 863695^2 + 664226^2 .

It is an emirp because it is prime and its reverse (1012325617811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1187165232101 is a prime.

It is a super-2 number, since 2×1187165232101² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1187165232151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593582616050 + 593582616051.

It is an arithmetic number, because the mean of its divisors is an integer number (593582616051).

Almost surely, 2^{1187165232101} is an apocalyptic number.

It is an amenable number.

1187165232101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187165232101 is an equidigital number, since it uses as much as digits as its factorization.

1187165232101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 1187165232101 in words is "one trillion, one hundred eighty-seven billion, one hundred sixty-five million, two hundred thirty-two thousand, one hundred one".