22221012021012 has 144 divisors (see below), whose sum is σ = 67398782156160. Its totient is φ = 6038442660096.

The previous prime is 22221012021011. The next prime is 22221012021127. The reversal of 22221012021012 is 21012021012222.

It is a happy number.

22221012021012 is a `hidden beast` number, since 222 + 210 + 1 + 20 + 210 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221012021011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22201723 + ... + 23180994.

Almost surely, 2^{22221012021012} is an apocalyptic number.

It is an amenable number.

22221012021012 is an abundant number, since it is smaller than the sum of its proper divisors (45177770135148).

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

22221012021012 is a wasteful number, since it uses less digits than its factorization.

22221012021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45382830 (or 45382825 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22221012021012 its reverse (21012021012222), we get a palindrome (43233033033234).

It can be divided in two parts, 222 and 21012021012, that multiplied together give a palindrome (4664668664664).

The spelling of 22221012021012 in words is "twenty-two trillion, two hundred twenty-one billion, twelve million, twenty-one thousand, twelve".