21501030325125 has 128 divisors (see below), whose sum is σ = 39114674726400. Its totient is φ = 10424534630400.

The previous prime is 21501030325091. The next prime is 21501030325147. The reversal of 21501030325125 is 52152303010512.

It is not a de Polignac number, because 21501030325125 - 2¹³ = 21501030316933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21501030325092 and 21501030325101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2269712389 + ... + 2269721861.

It is an arithmetic number, because the mean of its divisors is an integer number (305583396300).

Almost surely, 2^{21501030325125} is an apocalyptic number.

21501030325125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21501030325125 is a deficient number, since it is larger than the sum of its proper divisors (17613644401275).

21501030325125 is a wasteful number, since it uses less digits than its factorization.

21501030325125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16520 (or 16510 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 21501030325125 its reverse (52152303010512), we get a palindrome (73653333335637).

The spelling of 21501030325125 in words is "twenty-one trillion, five hundred one billion, thirty million, three hundred twenty-five thousand, one hundred twenty-five".