1123212001 has 4 divisors (see below), whose sum is σ = 1127181232. Its totient is φ = 1119242772.

The previous prime is 1123211993. The next prime is 1123212007. The reversal of 1123212001 is 1002123211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1123212001 - 2³ = 1123211993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123212007) 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, 1984191 + ... + 1984756.

It is an arithmetic number, because the mean of its divisors is an integer number (281795308).

Almost surely, 2^1123212001 is an apocalyptic number.

It is an amenable number.

1123212001 is a deficient number, since it is larger than the sum of its proper divisors (3969231).

1123212001 is an equidigital number, since it uses as much as digits as its factorization.

1123212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969230.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1123212001 is about 33514.3551482048. The cubic root of 1123212001 is about 1039.4906285809.

Adding to 1123212001 its reverse (1002123211), we get a palindrome (2125335212).

The spelling of 1123212001 in words is "one billion, one hundred twenty-three million, two hundred twelve thousand, one".