1123001002 has 4 divisors (see below), whose sum is σ = 1684501506. Its totient is φ = 561500500.

The previous prime is 1123000999. The next prime is 1123001027. The reversal of 1123001002 is 2001003211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2001003211 = 2237 ⋅894503.

It can be written as a sum of positive squares in only one way, i.e., 966525921 + 156475081 = 31089^2 + 12509^2 .

It is a super-2 number, since 2×1123001002² = 2522262500986008008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123001002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280750249 + ... + 280750252.

Almost surely, 2^1123001002 is an apocalyptic number.

1123001002 is a deficient number, since it is larger than the sum of its proper divisors (561500504).

1123001002 is an equidigital number, since it uses as much as digits as its factorization.

1123001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561500503.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1123001002 is about 33511.2071104578. The cubic root of 1123001002 is about 1039.4255339480.

Adding to 1123001002 its reverse (2001003211), we get a palindrome (3124004213).

The spelling of 1123001002 in words is "one billion, one hundred twenty-three million, one thousand, two".