1013221001 has 16 divisors (see below), whose sum is σ = 1140061440. Its totient is φ = 893471040.

The previous prime is 1013220959. The next prime is 1013221031. The reversal of 1013221001 is 1001223101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1013221001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1013221031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303620 + ... + 306938.

It is an arithmetic number, because the mean of its divisors is an integer number (71253840).

Almost surely, 2^1013221001 is an apocalyptic number.

It is an amenable number.

1013221001 is a deficient number, since it is larger than the sum of its proper divisors (126840439).

1013221001 is a wasteful number, since it uses less digits than its factorization.

1013221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4376.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1013221001 is about 31831.1325748865. The cubic root of 1013221001 is about 1004.3877200882.

Adding to 1013221001 its reverse (1001223101), we get a palindrome (2014444102).

The spelling of 1013221001 in words is "one billion, thirteen million, two hundred twenty-one thousand, one".