21101231103 has 8 divisors (see below), whose sum is σ = 28136549808. Its totient is φ = 14066699904.

The previous prime is 21101231087. The next prime is 21101231117. The reversal of 21101231103 is 30113210112.

It is a happy number.

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

It is not a de Polignac number, because 21101231103 - 2⁴ = 21101231087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101231143) 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, 131226 + ... + 243767.

It is an arithmetic number, because the mean of its divisors is an integer number (3517068726).

Almost surely, 2^21101231103 is an apocalyptic number.

21101231103 is a deficient number, since it is larger than the sum of its proper divisors (7035318705).

21101231103 is a wasteful number, since it uses less digits than its factorization.

21101231103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393753.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21101231103 its reverse (30113210112), we get a palindrome (51214441215).

The spelling of 21101231103 in words is "twenty-one billion, one hundred one million, two hundred thirty-one thousand, one hundred three".