21222102231 has 48 divisors (see below), whose sum is σ = 36731485440. Its totient is φ = 11655135360.

The previous prime is 21222102229. The next prime is 21222102287. The reversal of 21222102231 is 13220122212.

21222102231 is a `hidden beast` number, since 212 + 221 + 0 + 2 + 231 = 666.

It is not a de Polignac number, because 21222102231 - 2¹ = 21222102229 is a prime.

It is a super-2 number, since 2×21222102231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222102211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 202006 + ... + 288531.

It is an arithmetic number, because the mean of its divisors is an integer number (765239280).

Almost surely, 2^21222102231 is an apocalyptic number.

21222102231 is a deficient number, since it is larger than the sum of its proper divisors (15509383209).

21222102231 is a wasteful number, since it uses less digits than its factorization.

21222102231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490596 (or 490593 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21222102231 its reverse (13220122212), we get a palindrome (34442224443).

The spelling of 21222102231 in words is "twenty-one billion, two hundred twenty-two million, one hundred two thousand, two hundred thirty-one".