1121321001 has 16 divisors (see below), whose sum is σ = 1602267264. Its totient is φ = 695718144.

The previous prime is 1121320987. The next prime is 1121321011. The reversal of 1121321001 is 1001231211.

It is not a de Polignac number, because 1121321001 - 2²² = 1117126697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121321011) 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, 217056 + ... + 222161.

It is an arithmetic number, because the mean of its divisors is an integer number (100141704).

Almost surely, 2^1121321001 is an apocalyptic number.

It is an amenable number.

1121321001 is a deficient number, since it is larger than the sum of its proper divisors (480946263).

1121321001 is a wasteful number, since it uses less digits than its factorization.

1121321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439280.

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

The square root of 1121321001 is about 33486.1314725962. The cubic root of 1121321001 is about 1038.9069510192.

Adding to 1121321001 its reverse (1001231211), we get a palindrome (2122552212).

The spelling of 1121321001 in words is "one billion, one hundred twenty-one million, three hundred twenty-one thousand, one".