21102231101 has 4 divisors (see below), whose sum is σ = 24116835552. Its totient is φ = 18087626652.

The previous prime is 21102231067. The next prime is 21102231103. The reversal of 21102231101 is 10113220112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21102231101 - 2¹⁸ = 21101968957 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 (21102231103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1507302215 + ... + 1507302228.

It is an arithmetic number, because the mean of its divisors is an integer number (6029208888).

Almost surely, 2^21102231101 is an apocalyptic number.

It is an amenable number.

21102231101 is a deficient number, since it is larger than the sum of its proper divisors (3014604451).

21102231101 is an equidigital number, since it uses as much as digits as its factorization.

21102231101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014604450.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21102231101 its reverse (10113220112), we get a palindrome (31215451213).

The spelling of 21102231101 in words is "twenty-one billion, one hundred two million, two hundred thirty-one thousand, one hundred one".