22221202231 has 4 divisors (see below), whose sum is σ = 23528331792. Its totient is φ = 20914072672.

The previous prime is 22221202229. The next prime is 22221202247. The reversal of 22221202231 is 13220212222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22221202231 - 2¹ = 22221202229 is a prime.

It is a super-2 number, since 2×22221202231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221202199 and 22221202208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221202271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653564755 + ... + 653564788.

It is an arithmetic number, because the mean of its divisors is an integer number (5882082948).

Almost surely, 2^22221202231 is an apocalyptic number.

22221202231 is a deficient number, since it is larger than the sum of its proper divisors (1307129561).

22221202231 is a wasteful number, since it uses less digits than its factorization.

22221202231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307129560.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22221202231 its reverse (13220212222), we get a palindrome (35441414453).

Subtracting from 22221202231 its reverse (13220212222), we obtain a palindrome (9000990009).

The spelling of 22221202231 in words is "twenty-two billion, two hundred twenty-one million, two hundred two thousand, two hundred thirty-one".