21200102202101 has 16 divisors (see below), whose sum is σ = 22663356629760. Its totient is φ = 19795088443200.

The previous prime is 21200102202077. The next prime is 21200102202131. The reversal of 21200102202101 is 10120220100212.

It is a cyclic number.

It is not a de Polignac number, because 21200102202101 - 2¹⁰ = 21200102201077 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 (21200102202131) 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, 84036845 + ... + 84288738.

It is an arithmetic number, because the mean of its divisors is an integer number (1416459789360).

Almost surely, 2^{21200102202101} is an apocalyptic number.

It is an amenable number.

21200102202101 is a deficient number, since it is larger than the sum of its proper divisors (1463254427659).

21200102202101 is a wasteful number, since it uses less digits than its factorization.

21200102202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168325756.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21200102202101 its reverse (10120220100212), we get a palindrome (31320322302313).

The spelling of 21200102202101 in words is "twenty-one trillion, two hundred billion, one hundred two million, two hundred two thousand, one hundred one".