1335040021 has 8 divisors (see below), whose sum is σ = 1527847424. Its totient is φ = 1142754480.

The previous prime is 1335040019. The next prime is 1335040033. The reversal of 1335040021 is 1200405331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1335040021 - 2¹ = 1335040019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1335040061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124965 + ... + 135226.

It is an arithmetic number, because the mean of its divisors is an integer number (190980928).

Almost surely, 2^1335040021 is an apocalyptic number.

It is an amenable number.

1335040021 is a deficient number, since it is larger than the sum of its proper divisors (192807403).

1335040021 is an equidigital number, since it uses as much as digits as its factorization.

1335040021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260931.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1335040021 is about 36538.1994767120. The cubic root of 1335040021 is about 1101.1118292791. Note that the first 3 decimals are identical.

Adding to 1335040021 its reverse (1200405331), we get a palindrome (2535445352).

The spelling of 1335040021 in words is "one billion, three hundred thirty-five million, forty thousand, twenty-one".