21200011011101 has 8 divisors (see below), whose sum is σ = 22860782125944. Its totient is φ = 19543525758720.

The previous prime is 21200011011043. The next prime is 21200011011133. The reversal of 21200011011101 is 10111011000212.

It can be written as a sum of positive squares in 4 ways, for example, as 5297868924100 + 15902142087001 = 2301710^2 + 3987749^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200011011101 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 (21200011011001) 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, 1071455336 + ... + 1071475121.

It is an arithmetic number, because the mean of its divisors is an integer number (2857597765743).

Almost surely, 2^{21200011011101} is an apocalyptic number.

It is an amenable number.

21200011011101 is a deficient number, since it is larger than the sum of its proper divisors (1660771114843).

21200011011101 is a wasteful number, since it uses less digits than its factorization.

21200011011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142931231.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21200011011101 its reverse (10111011000212), we get a palindrome (31311022011313).

The spelling of 21200011011101 in words is "twenty-one trillion, two hundred billion, eleven million, eleven thousand, one hundred one".