1335839221 has 2 divisors, whose sum is σ = 1335839222. Its totient is φ = 1335839220.

The previous prime is 1335839177. The next prime is 1335839257. The reversal of 1335839221 is 1229385331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198128996 + 137710225 = 34614^2 + 11735^2 .

It is an emirp because it is prime and its reverse (1229385331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1335839221 - 2¹⁵ = 1335806453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1335839291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667919610 + 667919611.

It is an arithmetic number, because the mean of its divisors is an integer number (667919611).

Almost surely, 2^1335839221 is an apocalyptic number.

It is an amenable number.

1335839221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1335839221 is an equidigital number, since it uses as much as digits as its factorization.

1335839221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 1335839221 is about 36549.1343399539. The cubic root of 1335839221 is about 1101.3315063469.

The spelling of 1335839221 in words is "one billion, three hundred thirty-five million, eight hundred thirty-nine thousand, two hundred twenty-one".