1121023123 has 16 divisors (see below), whose sum is σ = 1288483200. Its totient is φ = 964586880.

The previous prime is 1121023117. The next prime is 1121023171. The reversal of 1121023123 is 3213201211.

It is a cyclic number.

It is not a de Polignac number, because 1121023123 - 2¹³ = 1121014931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121023097 and 1121023106.

It is not an unprimeable number, because it can be changed into a prime (1121023823) 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, 336715 + ... + 340027.

It is an arithmetic number, because the mean of its divisors is an integer number (80530200).

Almost surely, 2^1121023123 is an apocalyptic number.

1121023123 is a deficient number, since it is larger than the sum of its proper divisors (167460077).

1121023123 is a wasteful number, since it uses less digits than its factorization.

1121023123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4962.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1121023123 is about 33481.6833955523. The cubic root of 1121023123 is about 1038.8149479467.

Adding to 1121023123 its reverse (3213201211), we get a palindrome (4334224334).

The spelling of 1121023123 in words is "one billion, one hundred twenty-one million, twenty-three thousand, one hundred twenty-three".