221332320331 has 2 divisors, whose sum is σ = 221332320332. Its totient is φ = 221332320330.

The previous prime is 221332320299. The next prime is 221332320347. The reversal of 221332320331 is 133023233122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221332320331 - 2⁵ = 221332320299 is a prime.

It is a super-2 number, since 2×221332320331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221332320296 and 221332320305.

It is not a weakly prime, because it can be changed into another prime (221332329331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110666160165 + 110666160166.

It is an arithmetic number, because the mean of its divisors is an integer number (110666160166).

Almost surely, 2^221332320331 is an apocalyptic number.

221332320331 is a deficient number, since it is larger than the sum of its proper divisors (1).

221332320331 is an equidigital number, since it uses as much as digits as its factorization.

221332320331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 221332320331 its reverse (133023233122), we get a palindrome (354355553453).

The spelling of 221332320331 in words is "two hundred twenty-one billion, three hundred thirty-two million, three hundred twenty thousand, three hundred thirty-one".