1231050118555 has 8 divisors (see below), whose sum is σ = 1479314750400. Its totient is φ = 983470356096.

The previous prime is 1231050118549. The next prime is 1231050118559. The reversal of 1231050118555 is 5558110501321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231050118555 - 2⁷ = 1231050118427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231050118559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171213390 + ... + 171220579.

It is an arithmetic number, because the mean of its divisors is an integer number (184914343800).

Almost surely, 2^{1231050118555} is an apocalyptic number.

1231050118555 is a deficient number, since it is larger than the sum of its proper divisors (248264631845).

1231050118555 is an equidigital number, since it uses as much as digits as its factorization.

1231050118555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342434693.

The product of its (nonzero) digits is 30000, while the sum is 37.

Adding to 1231050118555 its reverse (5558110501321), we get a palindrome (6789160619876).

The spelling of 1231050118555 in words is "one trillion, two hundred thirty-one billion, fifty million, one hundred eighteen thousand, five hundred fifty-five".