1000221011100 has 216 divisors, whose sum is σ = 3229187100048. Its totient is φ = 258765926400.

The previous prime is 1000221011057. The next prime is 1000221011113. The reversal of 1000221011100 is 11101220001.

It is a happy number.

1000221011100 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11511820 + ... + 11598380.

It is an arithmetic number, because the mean of its divisors is an integer number (14949940278).

Almost surely, 2^{1000221011100} is an apocalyptic number.

1000221011100 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 1000221011100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1614593550024).

1000221011100 is an abundant number, since it is smaller than the sum of its proper divisors (2228966088948).

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

1000221011100 is a wasteful number, since it uses less digits than its factorization.

1000221011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86965 (or 86955 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1000221011100 its reverse (11101220001), we get a palindrome (1011322231101).

The spelling of 1000221011100 in words is "one trillion, two hundred twenty-one million, eleven thousand, one hundred".