21200120110001 has 48 divisors (see below), whose sum is σ = 24913169043840. Its totient is φ = 17987126976000.

The previous prime is 21200120109989. The next prime is 21200120110019. The reversal of 21200120110001 is 10001102100212.

It is not a de Polignac number, because 21200120110001 - 2¹⁴ = 21200120093617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21200120110601) 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 47 ways as a sum of consecutive naturals, for example, 2090530391 + ... + 2090540531.

It is an arithmetic number, because the mean of its divisors is an integer number (519024355080).

Almost surely, 2^{21200120110001} is an apocalyptic number.

It is an amenable number.

21200120110001 is a deficient number, since it is larger than the sum of its proper divisors (3713048933839).

21200120110001 is a wasteful number, since it uses less digits than its factorization.

21200120110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11446 (or 11439 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21200120110001 its reverse (10001102100212), we get a palindrome (31201222210213).

The spelling of 21200120110001 in words is "twenty-one trillion, two hundred billion, one hundred twenty million, one hundred ten thousand, one".