21000202002101 has 8 divisors (see below), whose sum is σ = 24220416464640. Its totient is φ = 17835033940848.

The previous prime is 21000202002089. The next prime is 21000202002127. The reversal of 21000202002101 is 10120020200012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21000202002101 - 2²⁶ = 21000134893237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000202002161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13761599501 + ... + 13761601026.

It is an arithmetic number, because the mean of its divisors is an integer number (3027552058080).

Almost surely, 2^{21000202002101} is an apocalyptic number.

It is an amenable number.

21000202002101 is a deficient number, since it is larger than the sum of its proper divisors (3220214462539).

21000202002101 is a wasteful number, since it uses less digits than its factorization.

21000202002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27523200643.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000202002101 its reverse (10120020200012), we get a palindrome (31120222202113).

The spelling of 21000202002101 in words is "twenty-one trillion, two hundred two million, two thousand, one hundred one".