22021221021100 has 54 divisors (see below), whose sum is σ = 55587853647060. Its totient is φ = 7550132919840.

The previous prime is 22021221021073. The next prime is 22021221021133. The reversal of 22021221021100 is 112012212022.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2247058470 + ... + 2247068269.

Almost surely, 2^{22021221021100} is an apocalyptic number.

22021221021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021221021100 is an abundant number, since it is smaller than the sum of its proper divisors (33566632625960).

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

22021221021100 is a wasteful number, since it uses less digits than its factorization.

22021221021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4494126767 (or 4494126753 counting only the distinct ones).

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

Adding to 22021221021100 its reverse (112012212022), we get a palindrome (22133233233122).

The spelling of 22021221021100 in words is "twenty-two trillion, twenty-one billion, two hundred twenty-one million, twenty-one thousand, one hundred".