21223311001 has 4 divisors (see below), whose sum is σ = 21223652992. Its totient is φ = 21222969012.

The previous prime is 21223310993. The next prime is 21223311013. The reversal of 21223311001 is 10011332212.

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 21223311001 - 2³ = 21223310993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223311091) 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 3 ways as a sum of consecutive naturals, for example, 48801 + ... + 211726.

It is an arithmetic number, because the mean of its divisors is an integer number (5305913248).

Almost surely, 2^21223311001 is an apocalyptic number.

It is an amenable number.

21223311001 is a deficient number, since it is larger than the sum of its proper divisors (341991).

21223311001 is an equidigital number, since it uses as much as digits as its factorization.

21223311001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341990.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21223311001 its reverse (10011332212), we get a palindrome (31234643213).

The spelling of 21223311001 in words is "twenty-one billion, two hundred twenty-three million, three hundred eleven thousand, one".