201000012021 has 12 divisors (see below), whose sum is σ = 295811339148. Its totient is φ = 131471705664.

The previous prime is 201000012007. The next prime is 201000012043. The reversal of 201000012021 is 120210000102.

201000012021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 70111625796 + 130888386225 = 264786^2 + 361785^2 .

It is not a de Polignac number, because 201000012021 - 2¹⁰ = 201000010997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 201000011994 and 201000012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000012001) 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 11 ways as a sum of consecutive naturals, for example, 210691360 + ... + 210692313.

It is an arithmetic number, because the mean of its divisors is an integer number (24650944929).

Almost surely, 2^201000012021 is an apocalyptic number.

It is an amenable number.

201000012021 is a deficient number, since it is larger than the sum of its proper divisors (94811327127).

201000012021 is a wasteful number, since it uses less digits than its factorization.

201000012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421383732 (or 421383729 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 201000012021 its reverse (120210000102), we get a palindrome (321210012123).

The spelling of 201000012021 in words is "two hundred one billion, twelve thousand, twenty-one".