21234121325 has 48 divisors (see below), whose sum is σ = 27362582016. Its totient is φ = 16335648000.

The previous prime is 21234121297. The next prime is 21234121339. The reversal of 21234121325 is 52312143212.

It is not a de Polignac number, because 21234121325 - 2¹⁶ = 21234055789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21234121294 and 21234121303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24211787 + ... + 24212663.

It is an arithmetic number, because the mean of its divisors is an integer number (570053792).

Almost surely, 2^21234121325 is an apocalyptic number.

21234121325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21234121325 is a deficient number, since it is larger than the sum of its proper divisors (6128460691).

21234121325 is a wasteful number, since it uses less digits than its factorization.

21234121325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254 (or 1249 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

Adding to 21234121325 its reverse (52312143212), we get a palindrome (73546264537).

The spelling of 21234121325 in words is "twenty-one billion, two hundred thirty-four million, one hundred twenty-one thousand, three hundred twenty-five".