22021221211000 has 128 divisors (see below), whose sum is σ = 56312982648000. Its totient is φ = 7993641216000.

The previous prime is 22021221210997. The next prime is 22021221211009. The reversal of 22021221211000 is 11212212022.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021221211009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4499836 + ... + 8018164.

Almost surely, 2^{22021221211000} is an apocalyptic number.

22021221211000 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 22021221211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28156491324000).

22021221211000 is an abundant number, since it is smaller than the sum of its proper divisors (34291761437000).

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

22021221211000 is a wasteful number, since it uses less digits than its factorization.

22021221211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518930 (or 3518916 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22021221211000 its reverse (11212212022), we get a palindrome (22032433423022).

The spelling of 22021221211000 in words is "twenty-two trillion, twenty-one billion, two hundred twenty-one million, two hundred eleven thousand".