21223231201 has 16 divisors (see below), whose sum is σ = 21519546048. Its totient is φ = 20929579200.

The previous prime is 21223231199. The next prime is 21223231207. The reversal of 21223231201 is 10213232212.

It is a cyclic number.

It is not a de Polignac number, because 21223231201 - 2¹ = 21223231199 is a prime.

It is a super-2 number, since 2×21223231201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223231207) 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, 17879130 + ... + 17880316.

It is an arithmetic number, because the mean of its divisors is an integer number (1344971628).

Almost surely, 2^21223231201 is an apocalyptic number.

It is an amenable number.

21223231201 is a deficient number, since it is larger than the sum of its proper divisors (296314847).

21223231201 is a wasteful number, since it uses less digits than its factorization.

21223231201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21223231201 its reverse (10213232212), we get a palindrome (31436463413).

It can be divided in two parts, 2122 and 3231201, that added together give a palindrome (3233323).

The spelling of 21223231201 in words is "twenty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, two hundred one".