22121211212000 has 96 divisors (see below), whose sum is σ = 54371247918624. Its totient is φ = 8845320960000.

The previous prime is 22121211211973. The next prime is 22121211212003. The reversal of 22121211212000 is 21211212122.

It is a self number, because there is not a number n which added to its sum of digits gives 22121211212000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121211212003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10216799 + ... + 12191201.

It is an arithmetic number, because the mean of its divisors is an integer number (566367165819).

Almost surely, 2^{22121211212000} is an apocalyptic number.

22121211212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121211212000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27185623959312).

22121211212000 is an abundant number, since it is smaller than the sum of its proper divisors (32250036706624).

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

22121211212000 is a wasteful number, since it uses less digits than its factorization.

22121211212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977229 (or 1977211 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22121211212000 its reverse (21211212122), we get a palindrome (22142422424122).

The spelling of 22121211212000 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twelve thousand".