1335501221 has 2 divisors, whose sum is σ = 1335501222. Its totient is φ = 1335501220.

The previous prime is 1335501197. The next prime is 1335501247. The reversal of 1335501221 is 1221055331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1207562500 + 127938721 = 34750^2 + 11311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1335501221 is a prime.

It is a super-2 number, since 2×1335501221² = 3567127022584981682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1335501281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667750610 + 667750611.

It is an arithmetic number, because the mean of its divisors is an integer number (667750611).

Almost surely, 2^1335501221 is an apocalyptic number.

It is an amenable number.

1335501221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1335501221 is an equidigital number, since it uses as much as digits as its factorization.

1335501221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1335501221 is about 36544.5101349026. The cubic root of 1335501221 is about 1101.2386105742.

Adding to 1335501221 its reverse (1221055331), we get a palindrome (2556556552).

The spelling of 1335501221 in words is "one billion, three hundred thirty-five million, five hundred one thousand, two hundred twenty-one".