1230221331 has 64 divisors (see below), whose sum is σ = 1918080000. Its totient is φ = 778740480.

The previous prime is 1230221327. The next prime is 1230221339. The reversal of 1230221331 is 1331220321.

1230221331 is a `hidden beast` number, since 12 + 302 + 21 + 331 = 666.

It is not a de Polignac number, because 1230221331 - 2² = 1230221327 is a prime.

It is a super-2 number, since 2×1230221331² = 3026889046494823122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1230221339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8256445 + ... + 8256593.

It is an arithmetic number, because the mean of its divisors is an integer number (29970000).

Almost surely, 2^1230221331 is an apocalyptic number.

1230221331 is a deficient number, since it is larger than the sum of its proper divisors (687858669).

1230221331 is a wasteful number, since it uses less digits than its factorization.

1230221331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1230221331 is about 35074.5111298789. The cubic root of 1230221331 is about 1071.5055322775.

Adding to 1230221331 its reverse (1331220321), we get a palindrome (2561441652).

It can be divided in two parts, 12302 and 21331, that added together give a palindrome (33633).

The spelling of 1230221331 in words is "one billion, two hundred thirty million, two hundred twenty-one thousand, three hundred thirty-one".