221331311330 has 16 divisors (see below), whose sum is σ = 398490910200. Its totient is φ = 88511513472.

The previous prime is 221331311297. The next prime is 221331311389. The reversal of 221331311330 is 33113133122.

It can be written as a sum of positive squares in 4 ways, for example, as 211727899321 + 9603412009 = 460139^2 + 97997^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221331311296 and 221331311305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2582105 + ... + 2666444.

Almost surely, 2^221331311330 is an apocalyptic number.

221331311330 is a deficient number, since it is larger than the sum of its proper divisors (177159598870).

221331311330 is a wasteful number, since it uses less digits than its factorization.

221331311330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252773.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 221331311330 its reverse (33113133122), we get a palindrome (254444444452).

The spelling of 221331311330 in words is "two hundred twenty-one billion, three hundred thirty-one million, three hundred eleven thousand, three hundred thirty".