1001223211 has 16 divisors (see below), whose sum is σ = 1074837600. Its totient is φ = 929302528.

The previous prime is 1001223163. The next prime is 1001223227. The reversal of 1001223211 is 1123221001.

It is a cyclic number.

It is not a de Polignac number, because 1001223211 - 2²³ = 992834603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001223191 and 1001223200.

It is not an unprimeable number, because it can be changed into a prime (1001223241) 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, 860316 + ... + 861478.

It is an arithmetic number, because the mean of its divisors is an integer number (67177350).

Almost surely, 2^1001223211 is an apocalyptic number.

1001223211 is a deficient number, since it is larger than the sum of its proper divisors (73614389).

1001223211 is a wasteful number, since it uses less digits than its factorization.

1001223211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838.

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

The square root of 1001223211 is about 31642.1113549649. Note that the first 3 decimals coincide. The cubic root of 1001223211 is about 1000.4075708634.

Adding to 1001223211 its reverse (1123221001), we get a palindrome (2124444212).

The spelling of 1001223211 in words is "one billion, one million, two hundred twenty-three thousand, two hundred eleven".