22021211221100 has 648 divisors, whose sum is σ = 63614296393200. Its totient is φ = 6557209666560.

The previous prime is 22021211221019. The next prime is 22021211221111. The reversal of 22021211221100 is 112211212022.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 3426356087 + ... + 3426362513.

Almost surely, 2^{22021211221100} is an apocalyptic number.

22021211221100 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 22021211221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31807148196600).

22021211221100 is an abundant number, since it is smaller than the sum of its proper divisors (41593085172100).

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

22021211221100 is a wasteful number, since it uses less digits than its factorization.

22021211221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6655 (or 6622 counting only the distinct ones).

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

Adding to 22021211221100 its reverse (112211212022), we get a palindrome (22133422433122).

The spelling of 22021211221100 in words is "twenty-two trillion, twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, one hundred".