21220231224222 has 40 divisors (see below), whose sum is σ = 47703919599336. Its totient is φ = 7050369966768.

The previous prime is 21220231224167. The next prime is 21220231224233. The reversal of 21220231224222 is 22242213202212.

21220231224222 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 0 + 231 + 2 + 2 + 422 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 213287533 + ... + 213387000.

Almost surely, 2^{21220231224222} is an apocalyptic number.

21220231224222 is an abundant number, since it is smaller than the sum of its proper divisors (26483688375114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220231224222 is a wasteful number, since it uses less digits than its factorization.

21220231224222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426674854 (or 426674845 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21220231224222 its reverse (22242213202212), we get a palindrome (43462444426434).

The spelling of 21220231224222 in words is "twenty-one trillion, two hundred twenty billion, two hundred thirty-one million, two hundred twenty-four thousand, two hundred twenty-two".