201334646021 has 4 divisors (see below), whose sum is σ = 201337416000. Its totient is φ = 201331876044.

The previous prime is 201334645991. The next prime is 201334646027. The reversal of 201334646021 is 120646433102.

201334646021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201334646021 - 2³⁴ = 184154776837 is a prime.

It is a super-2 number, since 2×201334646021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201334646027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272941 + ... + 1422338.

It is an arithmetic number, because the mean of its divisors is an integer number (50334354000).

Almost surely, 2^201334646021 is an apocalyptic number.

It is an amenable number.

201334646021 is a deficient number, since it is larger than the sum of its proper divisors (2769979).

201334646021 is an equidigital number, since it uses as much as digits as its factorization.

201334646021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769978.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 201334646021 in words is "two hundred one billion, three hundred thirty-four million, six hundred forty-six thousand, twenty-one".