22001121210012 has 192 divisors, whose sum is σ = 59211493576704. Its totient is φ = 6228298137600.

The previous prime is 22001121209971. The next prime is 22001121210031. The reversal of 22001121210012 is 21001212110022.

It is a junction number, because it is equal to n+sod(n) for n = 22001121209973 and 22001121210000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4511197318 + ... + 4511202194.

It is an arithmetic number, because the mean of its divisors is an integer number (308393195712).

Almost surely, 2^{22001121210012} 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 22001121210012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29605746788352).

22001121210012 is an abundant number, since it is smaller than the sum of its proper divisors (37210372366692).

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

22001121210012 is a wasteful number, since it uses less digits than its factorization.

22001121210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6148 (or 6146 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22001121210012 its reverse (21001212110022), we get a palindrome (43002333320034).

The spelling of 22001121210012 in words is "twenty-two trillion, one billion, one hundred twenty-one million, two hundred ten thousand, twelve".