21200011021101 has 64 divisors (see below), whose sum is σ = 31155531264000. Its totient is φ = 12716374809600.

The previous prime is 21200011021081. The next prime is 21200011021129. The reversal of 21200011021101 is 10112011000212.

It is not a de Polignac number, because 21200011021101 - 2⁶ = 21200011021037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200011021151) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 971530771 + ... + 971552591.

It is an arithmetic number, because the mean of its divisors is an integer number (486805176000).

Almost surely, 2^{21200011021101} is an apocalyptic number.

It is an amenable number.

21200011021101 is a deficient number, since it is larger than the sum of its proper divisors (9955520242899).

21200011021101 is a wasteful number, since it uses less digits than its factorization.

21200011021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22810.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21200011021101 its reverse (10112011000212), we get a palindrome (31312022021313).

The spelling of 21200011021101 in words is "twenty-one trillion, two hundred billion, eleven million, twenty-one thousand, one hundred one".