1181320065123 has 8 divisors (see below), whose sum is σ = 1718283731136. Its totient is φ = 715951554600.

The previous prime is 1181320065113. The next prime is 1181320065131. The reversal of 1181320065123 is 3215600231811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1181320065123 - 2¹⁷ = 1181319934051 is a prime.

It is a super-2 number, since 2×1181320065123² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 35797577731 = 1181320065123 / (1 + 1 + 8 + 1 + 3 + 2 + 0 + 0 + 6 + 5 + 1 + 2 + 3).

It is not an unprimeable number, because it can be changed into a prime (1181320065113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17898788833 + ... + 17898788898.

It is an arithmetic number, because the mean of its divisors is an integer number (214785466392).

Almost surely, 2^{1181320065123} is an apocalyptic number.

1181320065123 is a deficient number, since it is larger than the sum of its proper divisors (536963666013).

1181320065123 is a wasteful number, since it uses less digits than its factorization.

1181320065123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35797577745.

The product of its (nonzero) digits is 8640, while the sum is 33.

Adding to 1181320065123 its reverse (3215600231811), we get a palindrome (4396920296934).

The spelling of 1181320065123 in words is "one trillion, one hundred eighty-one billion, three hundred twenty million, sixty-five thousand, one hundred twenty-three".