1111012221200 has 180 divisors, whose sum is σ = 3105970931700. Its totient is φ = 380798853120.

The previous prime is 1111012221181. The next prime is 1111012221223. The reversal of 1111012221200 is 21222101111.

It can be written as a sum of positive squares in 6 ways, for example, as 470135120896 + 640877100304 = 685664^2 + 800548^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 81391976 + ... + 81405624.

It is an arithmetic number, because the mean of its divisors is an integer number (17255394065).

Almost surely, 2^{1111012221200} is an apocalyptic number.

1111012221200 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 1111012221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552985465850).

1111012221200 is an abundant number, since it is smaller than the sum of its proper divisors (1994958710500).

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

1111012221200 is a wasteful number, since it uses less digits than its factorization.

1111012221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17834 (or 17816 counting only the distinct ones).

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

Adding to 1111012221200 its reverse (21222101111), we get a palindrome (1132234322311).

The spelling of 1111012221200 in words is "one trillion, one hundred eleven billion, twelve million, two hundred twenty-one thousand, two hundred".