1222001111100 has 1152 divisors, whose sum is σ = 4791053352960. Its totient is φ = 232740864000.

The previous prime is 1222001111087. The next prime is 1222001111143. The reversal of 1222001111100 is 11111002221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 3329703117 + ... + 3329703483.

It is an arithmetic number, because the mean of its divisors is an integer number (4158900480).

Almost surely, 2^{1222001111100} is an apocalyptic number.

1222001111100 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 1222001111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2395526676480).

1222001111100 is an abundant number, since it is smaller than the sum of its proper divisors (3569052241860).

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

1222001111100 is a wasteful number, since it uses less digits than its factorization.

1222001111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1222001111100 its reverse (11111002221), we get a palindrome (1233112113321).

The spelling of 1222001111100 in words is "one trillion, two hundred twenty-two billion, one million, one hundred eleven thousand, one hundred".