21102201105 has 32 divisors (see below), whose sum is σ = 34360913664. Its totient is φ = 11057074176.

The previous prime is 21102201101. The next prime is 21102201137. The reversal of 21102201105 is 50110220112.

It is not a de Polignac number, because 21102201105 - 2² = 21102201101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21102201101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146404 + ... + 252266.

It is an arithmetic number, because the mean of its divisors is an integer number (1073778552).

Almost surely, 2^21102201105 is an apocalyptic number.

It is an amenable number.

21102201105 is a deficient number, since it is larger than the sum of its proper divisors (13258712559).

21102201105 is a wasteful number, since it uses less digits than its factorization.

21102201105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106105.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 21102201105 its reverse (50110220112), we get a palindrome (71212421217).

The spelling of 21102201105 in words is "twenty-one billion, one hundred two million, two hundred one thousand, one hundred five".