1155343403123 has 16 divisors (see below), whose sum is σ = 1423522093056. Its totient is φ = 913114369440.

The previous prime is 1155343403119. The next prime is 1155343403143. The reversal of 1155343403123 is 3213043435511.

It is not a de Polignac number, because 1155343403123 - 2² = 1155343403119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155343403143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6885311 + ... + 7051112.

It is an arithmetic number, because the mean of its divisors is an integer number (88970130816).

Almost surely, 2^{1155343403123} is an apocalyptic number.

1155343403123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1155343403123 is a deficient number, since it is larger than the sum of its proper divisors (268178689933).

1155343403123 is a wasteful number, since it uses less digits than its factorization.

1155343403123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13937354.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 1155343403123 its reverse (3213043435511), we get a palindrome (4368386838634).

The spelling of 1155343403123 in words is "one trillion, one hundred fifty-five billion, three hundred forty-three million, four hundred three thousand, one hundred twenty-three".