1155222123 has 16 divisors (see below), whose sum is σ = 1680950016. Its totient is φ = 699873440.

The previous prime is 1155222049. The next prime is 1155222139. The reversal of 1155222123 is 3212225511.

It is a cyclic number.

It is not a de Polignac number, because 1155222123 - 2⁹ = 1155221611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1155222093 and 1155222102.

It is not an unprimeable number, because it can be changed into a prime (1155222193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119665 + ... + 128957.

It is an arithmetic number, because the mean of its divisors is an integer number (105059376).

Almost surely, 2^1155222123 is an apocalyptic number.

1155222123 is a deficient number, since it is larger than the sum of its proper divisors (525727893).

1155222123 is a wasteful number, since it uses less digits than its factorization.

1155222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13074.

The product of its digits is 1200, while the sum is 24.

The square root of 1155222123 is about 33988.5587073062. The cubic root of 1155222123 is about 1049.2730033358.

Adding to 1155222123 its reverse (3212225511), we get a palindrome (4367447634).

The spelling of 1155222123 in words is "one billion, one hundred fifty-five million, two hundred twenty-two thousand, one hundred twenty-three".