1021100100201 has 24 divisors (see below), whose sum is σ = 1497403724544. Its totient is φ = 670363737120.

The previous prime is 1021100100199. The next prime is 1021100100217. The reversal of 1021100100201 is 1020010011201.

It is a happy number.

It is not a de Polignac number, because 1021100100201 - 2¹ = 1021100100199 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1021100101201) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1679400 + ... + 2205126.

It is an arithmetic number, because the mean of its divisors is an integer number (62391821856).

Almost surely, 2^{1021100100201} is an apocalyptic number.

It is an amenable number.

1021100100201 is a deficient number, since it is larger than the sum of its proper divisors (476303624343).

1021100100201 is a wasteful number, since it uses less digits than its factorization.

1021100100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529021 (or 529018 counting only the distinct ones).

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

Adding to 1021100100201 its reverse (1020010011201), we get a palindrome (2041110111402).

The spelling of 1021100100201 in words is "one trillion, twenty-one billion, one hundred million, one hundred thousand, two hundred one".