1334520021 has 8 divisors (see below), whose sum is σ = 1817218944. Its totient is φ = 870750560.

The previous prime is 1334520017. The next prime is 1334520037. The reversal of 1334520021 is 1200254331.

1334520021 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 1334520021 - 2² = 1334520017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1334520021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1334520071) 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, 4732200 + ... + 4732481.

It is an arithmetic number, because the mean of its divisors is an integer number (227152368).

Almost surely, 2^1334520021 is an apocalyptic number.

It is an amenable number.

1334520021 is a deficient number, since it is larger than the sum of its proper divisors (482698923).

1334520021 is an equidigital number, since it uses as much as digits as its factorization.

1334520021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9464731.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1334520021 is about 36531.0829431595. The cubic root of 1334520021 is about 1100.9688491691.

Adding to 1334520021 its reverse (1200254331), we get a palindrome (2534774352).

The spelling of 1334520021 in words is "one billion, three hundred thirty-four million, five hundred twenty thousand, twenty-one".