21102230123 has 12 divisors (see below), whose sum is σ = 23139603360. Its totient is φ = 19232400096.

The previous prime is 21102230119. The next prime is 21102230137. The reversal of 21102230123 is 32103220112.

It is not a de Polignac number, because 21102230123 - 2² = 21102230119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102230143) 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, 776936 + ... + 803637.

It is an arithmetic number, because the mean of its divisors is an integer number (1928300280).

Almost surely, 2^21102230123 is an apocalyptic number.

21102230123 is a deficient number, since it is larger than the sum of its proper divisors (2037373237).

21102230123 is a wasteful number, since it uses less digits than its factorization.

21102230123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580678 (or 1580665 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21102230123 its reverse (32103220112), we get a palindrome (53205450235).

The spelling of 21102230123 in words is "twenty-one billion, one hundred two million, two hundred thirty thousand, one hundred twenty-three".