21112230123 has 16 divisors (see below), whose sum is σ = 31342694400. Its totient is φ = 14045427720.

The previous prime is 21112230121. The next prime is 21112230151. The reversal of 21112230123 is 32103221112.

It is not a de Polignac number, because 21112230123 - 2¹ = 21112230121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21112230096 and 21112230105.

It is not an unprimeable number, because it can be changed into a prime (21112230121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 803283 + ... + 829148.

It is an arithmetic number, because the mean of its divisors is an integer number (1958918400).

Almost surely, 2^21112230123 is an apocalyptic number.

21112230123 is a deficient number, since it is larger than the sum of its proper divisors (10230464277).

21112230123 is a wasteful number, since it uses less digits than its factorization.

21112230123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632919 (or 1632913 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21112230123 its reverse (32103221112), we get a palindrome (53215451235).

The spelling of 21112230123 in words is "twenty-one billion, one hundred twelve million, two hundred thirty thousand, one hundred twenty-three".