1123121001 has 8 divisors (see below), whose sum is σ = 1505861280. Its totient is φ = 744564032.

The previous prime is 1123120969. The next prime is 1123121003. The reversal of 1123121001 is 1001213211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123121001 - 2⁵ = 1123120969 is a prime.

It is a super-2 number, since 2×1123121001² = 2522801565774484002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045200 + ... + 1046273.

It is an arithmetic number, because the mean of its divisors is an integer number (188232660).

Almost surely, 2^1123121001 is an apocalyptic number.

It is an amenable number.

1123121001 is a deficient number, since it is larger than the sum of its proper divisors (382740279).

1123121001 is a wasteful number, since it uses less digits than its factorization.

1123121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091655.

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

The square root of 1123121001 is about 33512.9974935099. The cubic root of 1123121001 is about 1039.4625554591.

Adding to 1123121001 its reverse (1001213211), we get a palindrome (2124334212).

The spelling of 1123121001 in words is "one billion, one hundred twenty-three million, one hundred twenty-one thousand, one".