21230231103 has 12 divisors (see below), whose sum is σ = 30681410760. Its totient is φ = 14146323696.

The previous prime is 21230231093. The next prime is 21230231119. The reversal of 21230231103 is 30113203212.

It is not a de Polignac number, because 21230231103 - 2¹⁸ = 21229968959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232231103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 578176 + ... + 613797.

It is an arithmetic number, because the mean of its divisors is an integer number (2556784230).

Almost surely, 2^21230231103 is an apocalyptic number.

21230231103 is a deficient number, since it is larger than the sum of its proper divisors (9451179657).

21230231103 is a wasteful number, since it uses less digits than its factorization.

21230231103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193958 (or 1193955 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21230231103 its reverse (30113203212), we get a palindrome (51343434315).

The spelling of 21230231103 in words is "twenty-one billion, two hundred thirty million, two hundred thirty-one thousand, one hundred three".