21020002200101 has 16 divisors (see below), whose sum is σ = 22268002176000. Its totient is φ = 19773285815808.

The previous prime is 21020002200083. The next prime is 21020002200133. The reversal of 21020002200101 is 10100220002012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21020002200101 - 2⁶ = 21020002200037 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 (21020002200161) 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, 294531260 + ... + 294602618.

It is an arithmetic number, because the mean of its divisors is an integer number (1391750136000).

Almost surely, 2^{21020002200101} is an apocalyptic number.

It is an amenable number.

21020002200101 is a deficient number, since it is larger than the sum of its proper divisors (1247999975899).

21020002200101 is a wasteful number, since it uses less digits than its factorization.

21020002200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80108.

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

Adding to 21020002200101 its reverse (10100220002012), we get a palindrome (31120222202113).

The spelling of 21020002200101 in words is "twenty-one trillion, twenty billion, two million, two hundred thousand, one hundred one".