221425210331 has 16 divisors (see below), whose sum is σ = 239836440480. Its totient is φ = 203214286080.

The previous prime is 221425210309. The next prime is 221425210337. The reversal of 221425210331 is 133012524122.

It is not a de Polignac number, because 221425210331 - 2¹⁰ = 221425209307 is a prime.

It is a super-2 number, since 2×221425210331² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221425210331.

It is not an unprimeable number, because it can be changed into a prime (221425210337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1512896 + ... + 1652786.

It is an arithmetic number, because the mean of its divisors is an integer number (14989777530).

Almost surely, 2^221425210331 is an apocalyptic number.

221425210331 is a deficient number, since it is larger than the sum of its proper divisors (18411230149).

221425210331 is a wasteful number, since it uses less digits than its factorization.

221425210331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140606.

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

Adding to 221425210331 its reverse (133012524122), we get a palindrome (354437734453).

The spelling of 221425210331 in words is "two hundred twenty-one billion, four hundred twenty-five million, two hundred ten thousand, three hundred thirty-one".