1021100011200 has 504 divisors, whose sum is σ = 3736032842880. Its totient is φ = 264314880000.

The previous prime is 1021100011153. The next prime is 1021100011219. The reversal of 1021100011200 is 21100011201.

It is a happy number.

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

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 71 ways as a sum of consecutive naturals, for example, 255209200 + ... + 255213200.

Almost surely, 2^{1021100011200} is an apocalyptic number.

1021100011200 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 1021100011200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1868016421440).

1021100011200 is an abundant number, since it is smaller than the sum of its proper divisors (2714932831680).

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

1021100011200 is a wasteful number, since it uses less digits than its factorization.

1021100011200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545 (or 4527 counting only the distinct ones).

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

Adding to 1021100011200 its reverse (21100011201), we get a palindrome (1042200022401).

Subtracting from 1021100011200 its reverse (21100011201), we obtain a palindrome (999999999999).

It can be divided in two parts, 102110001 and 1200, that added together give a palindrome (102111201).

The spelling of 1021100011200 in words is "one trillion, twenty-one billion, one hundred million, eleven thousand, two hundred".