21110220221101 has 16 divisors (see below), whose sum is σ = 24090533232768. Its totient is φ = 18310935808000.

The previous prime is 21110220221099. The next prime is 21110220221113. The reversal of 21110220221101 is 10112202201112.

It is not a de Polignac number, because 21110220221101 - 2¹ = 21110220221099 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 (21110220201101) 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, 103937956 + ... + 104140861.

It is an arithmetic number, because the mean of its divisors is an integer number (1505658327048).

Almost surely, 2^{21110220221101} is an apocalyptic number.

It is an amenable number.

21110220221101 is a deficient number, since it is larger than the sum of its proper divisors (2980313011667).

21110220221101 is a wasteful number, since it uses less digits than its factorization.

21110220221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208079252.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21110220221101 its reverse (10112202201112), we get a palindrome (31222422422213).

The spelling of 21110220221101 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty million, two hundred twenty-one thousand, one hundred one".