221254125331 has 4 divisors (see below), whose sum is σ = 221260093272. Its totient is φ = 221248157392.

The previous prime is 221254125293. The next prime is 221254125343. The reversal of 221254125331 is 133521452122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221254125331 - 2³¹ = 219106641683 is a prime.

It is a super-2 number, since 2×221254125331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221254125293 and 221254125302.

It is not an unprimeable number, because it can be changed into a prime (221254125431) 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 3 ways as a sum of consecutive naturals, for example, 2928010 + ... + 3002623.

It is an arithmetic number, because the mean of its divisors is an integer number (55315023318).

Almost surely, 2^221254125331 is an apocalyptic number.

221254125331 is a deficient number, since it is larger than the sum of its proper divisors (5967941).

221254125331 is an equidigital number, since it uses as much as digits as its factorization.

221254125331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5967940.

The product of its digits is 14400, while the sum is 31.

Adding to 221254125331 its reverse (133521452122), we get a palindrome (354775577453).

The spelling of 221254125331 in words is "two hundred twenty-one billion, two hundred fifty-four million, one hundred twenty-five thousand, three hundred thirty-one".