22145044021212 has 192 divisors, whose sum is σ = 62856962058240. Its totient is φ = 5932870272000.

The previous prime is 22145044021201. The next prime is 22145044021237. The reversal of 22145044021212 is 21212044054122.

It is a self number, because there is not a number n which added to its sum of digits gives 22145044021212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48534337 + ... + 48988487.

It is an arithmetic number, because the mean of its divisors is an integer number (327380010720).

Almost surely, 2^{22145044021212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22145044021212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31428481029120).

22145044021212 is an abundant number, since it is smaller than the sum of its proper divisors (40711918037028).

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

22145044021212 is a wasteful number, since it uses less digits than its factorization.

22145044021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454772 (or 454770 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

Adding to 22145044021212 its reverse (21212044054122), we get a palindrome (43357088075334).

The spelling of 22145044021212 in words is "twenty-two trillion, one hundred forty-five billion, forty-four million, twenty-one thousand, two hundred twelve".