1021211200100 has 432 divisors, whose sum is σ = 2930799916800. Its totient is φ = 305289492480.

The previous prime is 1021211200099. The next prime is 1021211200151. The reversal of 1021211200100 is 10021121201.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 495011669 + ... + 495013731.

Almost surely, 2^{1021211200100} is an apocalyptic number.

1021211200100 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 1021211200100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465399958400).

1021211200100 is an abundant number, since it is smaller than the sum of its proper divisors (1909588716700).

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

1021211200100 is a wasteful number, since it uses less digits than its factorization.

1021211200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532 (or 2518 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021211200100 its reverse (10021121201), we get a palindrome (1031232321301).

The spelling of 1021211200100 in words is "one trillion, twenty-one billion, two hundred eleven million, two hundred thousand, one hundred".