21242222224212 has 36 divisors (see below), whose sum is σ = 54480740749568. Its totient is φ = 6437037037200.

The previous prime is 21242222224211. The next prime is 21242222224217.

21242222224212 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21242222224212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242222224211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7314813364 + ... + 7314816267.

Almost surely, 2^{21242222224212} is an apocalyptic number.

21242222224212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21242222224212 is an abundant number, since it is smaller than the sum of its proper divisors (33238518525356).

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

21242222224212 is a wasteful number, since it uses less digits than its factorization.

21242222224212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14629629660 (or 14629629647 counting only the distinct ones).

The product of its digits is 16384, while the sum is 30.

It can be divided in two parts, 2124222 and 2224212, that added together give a palindrome (4348434).

The spelling of 21242222224212 in words is "twenty-one trillion, two hundred forty-two billion, two hundred twenty-two million, two hundred twenty-four thousand, two hundred twelve".