221325353331 has 16 divisors (see below), whose sum is σ = 297913351680. Its totient is φ = 146148723360.

The previous prime is 221325353323. The next prime is 221325353351. The reversal of 221325353331 is 133353523122.

It is a happy number.

It is not a de Polignac number, because 221325353331 - 2³ = 221325353323 is a prime.

It is a super-2 number, since 2×221325353331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221325353292 and 221325353301.

It is not an unprimeable number, because it can be changed into a prime (221325353351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436000 + ... + 795453.

It is an arithmetic number, because the mean of its divisors is an integer number (18619584480).

Almost surely, 2^221325353331 is an apocalyptic number.

221325353331 is a deficient number, since it is larger than the sum of its proper divisors (76587998349).

221325353331 is a wasteful number, since it uses less digits than its factorization.

221325353331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232026.

The product of its digits is 48600, while the sum is 33.

Adding to 221325353331 its reverse (133353523122), we get a palindrome (354678876453).

The spelling of 221325353331 in words is "two hundred twenty-one billion, three hundred twenty-five million, three hundred fifty-three thousand, three hundred thirty-one".