21000100002201 has 16 divisors (see below), whose sum is σ = 31402018699200. Its totient is φ = 13869224921664.

The previous prime is 21000100002169. The next prime is 21000100002229. The reversal of 21000100002201 is 10220000100012.

It is not a de Polignac number, because 21000100002201 - 2⁵ = 21000100002169 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 (21000100022201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3634490016 + ... + 3634495793.

It is an arithmetic number, because the mean of its divisors is an integer number (1962626168700).

Almost surely, 2^{21000100002201} is an apocalyptic number.

It is an amenable number.

21000100002201 is a deficient number, since it is larger than the sum of its proper divisors (10401918696999).

21000100002201 is a wasteful number, since it uses less digits than its factorization.

21000100002201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7268985925 (or 7268985919 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21000100002201 its reverse (10220000100012), we get a palindrome (31220100102213).

The spelling of 21000100002201 in words is "twenty-one trillion, one hundred million, two thousand, two hundred one".