21023112303123 has 24 divisors (see below), whose sum is σ = 33093952005312. Its totient is φ = 11833905427344.

The previous prime is 21023112303041. The next prime is 21023112303139. The reversal of 21023112303123 is 32130321132012.

It is not a de Polignac number, because 21023112303123 - 2¹³ = 21023112294931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21023112303093 and 21023112303102.

It is not an unprimeable number, because it can be changed into a prime (21023112304123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1067261565 + ... + 1067281262.

It is an arithmetic number, because the mean of its divisors is an integer number (1378914666888).

Almost surely, 2^{21023112303123} is an apocalyptic number.

21023112303123 is a deficient number, since it is larger than the sum of its proper divisors (12070839702189).

21023112303123 is a wasteful number, since it uses less digits than its factorization.

21023112303123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134542911 (or 2134542904 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21023112303123 its reverse (32130321132012), we get a palindrome (53153433435135).

The spelling of 21023112303123 in words is "twenty-one trillion, twenty-three billion, one hundred twelve million, three hundred three thousand, one hundred twenty-three".