21200102121101 has 32 divisors (see below), whose sum is σ = 24393953203200. Its totient is φ = 18290749501440.

The previous prime is 21200102121083. The next prime is 21200102121113. The reversal of 21200102121101 is 10112120100212.

It is a cyclic number.

It is not a de Polignac number, because 21200102121101 - 2¹⁰ = 21200102120077 is a prime.

It is a super-2 number, since 2×21200102121101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200102121701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79901465 + ... + 80166353.

It is an arithmetic number, because the mean of its divisors is an integer number (762311037600).

Almost surely, 2^{21200102121101} is an apocalyptic number.

It is an amenable number.

21200102121101 is a deficient number, since it is larger than the sum of its proper divisors (3193851082099).

21200102121101 is a wasteful number, since it uses less digits than its factorization.

21200102121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272949.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21200102121101 its reverse (10112120100212), we get a palindrome (31312222221313).

The spelling of 21200102121101 in words is "twenty-one trillion, two hundred billion, one hundred two million, one hundred twenty-one thousand, one hundred one".