22221122100000 has 288 divisors, whose sum is σ = 72926746889472. Its totient is φ = 5924140800000.

The previous prime is 22221122099993. The next prime is 22221122100011. The reversal of 22221122100000 is 122112222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1721093545 + ... + 1721106455.

It is an arithmetic number, because the mean of its divisors is an integer number (253217871144).

Almost surely, 2^{22221122100000} is an apocalyptic number.

22221122100000 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 22221122100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36463373444736).

22221122100000 is an abundant number, since it is smaller than the sum of its proper divisors (50705624789472).

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

22221122100000 is an equidigital number, since it uses as much as digits as its factorization.

22221122100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18686 (or 18658 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22221122100000 its reverse (122112222), we get a palindrome (22221244212222).

The spelling of 22221122100000 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred thousand".