1222111120100 has 288 divisors, whose sum is σ = 3045461328000. Its totient is φ = 421949952000.

The previous prime is 1222111120063. The next prime is 1222111120121. The reversal of 1222111120100 is 10211112221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1165024376 + ... + 1165025424.

It is an arithmetic number, because the mean of its divisors is an integer number (10574518500).

Almost surely, 2^{1222111120100} is an apocalyptic number.

1222111120100 is a gapful number since it is divisible by the number (10) 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 1222111120100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1522730664000).

1222111120100 is an abundant number, since it is smaller than the sum of its proper divisors (1823350207900).

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

1222111120100 is a wasteful number, since it uses less digits than its factorization.

1222111120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663 (or 1656 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1222111120100 its reverse (10211112221), we get a palindrome (1232322232321).

The spelling of 1222111120100 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, one hundred twenty thousand, one hundred".