21222300231 has 36 divisors (see below), whose sum is σ = 33720894480. Its totient is φ = 12851942400.

The previous prime is 21222300181. The next prime is 21222300233. The reversal of 21222300231 is 13200322212.

21222300231 is a `hidden beast` number, since 212 + 223 + 0 + 0 + 231 = 666.

It is not a de Polignac number, because 21222300231 - 2¹¹ = 21222298183 is a prime.

It is a super-2 number, since 2×21222300231² (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 (21222300233) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1527486 + ... + 1541316.

Almost surely, 2^21222300231 is an apocalyptic number.

21222300231 is a deficient number, since it is larger than the sum of its proper divisors (12498594249).

21222300231 is a wasteful number, since it uses less digits than its factorization.

21222300231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15268 (or 15254 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21222300231 its reverse (13200322212), we get a palindrome (34422622443).

The spelling of 21222300231 in words is "twenty-one billion, two hundred twenty-two million, three hundred thousand, two hundred thirty-one".