221430350125 has 16 divisors (see below), whose sum is σ = 276358663152. Its totient is φ = 177135571200.

The previous prime is 221430350123. The next prime is 221430350131. The reversal of 221430350125 is 521053034122.

It can be written as a sum of positive squares in 8 ways, for example, as 73031279049 + 148399071076 = 270243^2 + 385226^2 .

It is not a de Polignac number, because 221430350125 - 2¹ = 221430350123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221430350093 and 221430350102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221430350123) 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, 4019769 + ... + 4074481.

It is an arithmetic number, because the mean of its divisors is an integer number (17272416447).

Almost surely, 2^221430350125 is an apocalyptic number.

221430350125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221430350125 is a deficient number, since it is larger than the sum of its proper divisors (54928313027).

221430350125 is an equidigital number, since it uses as much as digits as its factorization.

221430350125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87105 (or 87095 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 221430350125 its reverse (521053034122), we get a palindrome (742483384247).

The spelling of 221430350125 in words is "two hundred twenty-one billion, four hundred thirty million, three hundred fifty thousand, one hundred twenty-five".