1103021123 has 4 divisors (see below), whose sum is σ = 1103456400. Its totient is φ = 1102585848.

The previous prime is 1103021063. The next prime is 1103021191. The reversal of 1103021123 is 3211203011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3211203011 = 419 ⋅7663969.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1103021123 is a prime.

It is a super-2 number, since 2×1103021123² = 2433311195568362258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1103021098 and 1103021107.

It is not an unprimeable number, because it can be changed into a prime (1103021723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213815 + ... + 218912.

It is an arithmetic number, because the mean of its divisors is an integer number (275864100).

Almost surely, 2^1103021123 is an apocalyptic number.

1103021123 is a deficient number, since it is larger than the sum of its proper divisors (435277).

1103021123 is an equidigital number, since it uses as much as digits as its factorization.

1103021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435276.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1103021123 is about 33211.7618171635. The cubic root of 1103021123 is about 1033.2242955938.

Adding to 1103021123 its reverse (3211203011), we get a palindrome (4314224134).

The spelling of 1103021123 in words is "one billion, one hundred three million, twenty-one thousand, one hundred twenty-three".