1331040221 has 16 divisors (see below), whose sum is σ = 1537624704. Its totient is φ = 1128605184.

The previous prime is 1331040203. The next prime is 1331040259. The reversal of 1331040221 is 1220401331.

It is not a de Polignac number, because 1331040221 - 2³⁰ = 257298397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331040221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331042221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507305 + ... + 509921.

It is an arithmetic number, because the mean of its divisors is an integer number (96101544).

Almost surely, 2^1331040221 is an apocalyptic number.

It is an amenable number.

1331040221 is a deficient number, since it is larger than the sum of its proper divisors (206584483).

1331040221 is a wasteful number, since it uses less digits than its factorization.

1331040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1331040221 is about 36483.4239210083. The cubic root of 1331040221 is about 1100.0110800537.

Adding to 1331040221 its reverse (1220401331), we get a palindrome (2551441552).

The spelling of 1331040221 in words is "one billion, three hundred thirty-one million, forty thousand, two hundred twenty-one".