1304005050021 has 32 divisors (see below), whose sum is σ = 1868289712128. Its totient is φ = 806073016320.

The previous prime is 1304005050001. The next prime is 1304005050067. The reversal of 1304005050021 is 1200505004031.

It is not a de Polignac number, because 1304005050021 - 2²¹ = 1304002952869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1304005050021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304005050001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3081180 + ... + 3478746.

It is an arithmetic number, because the mean of its divisors is an integer number (58384053504).

Almost surely, 2^{1304005050021} is an apocalyptic number.

It is an amenable number.

1304005050021 is a deficient number, since it is larger than the sum of its proper divisors (564284662107).

1304005050021 is a wasteful number, since it uses less digits than its factorization.

1304005050021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398541.

The product of its (nonzero) digits is 600, while the sum is 21.

The spelling of 1304005050021 in words is "one trillion, three hundred four billion, five million, fifty thousand, twenty-one".