201010200021 has 16 divisors (see below), whose sum is σ = 315310118400. Its totient is φ = 126124046784.

The previous prime is 201010199983. The next prime is 201010200029. The reversal of 201010200021 is 120002010102.

It is not a de Polignac number, because 201010200021 - 2²⁶ = 200943091157 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 = 201010199976 and 201010200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201010200029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218964901 + ... + 218965818.

It is an arithmetic number, because the mean of its divisors is an integer number (19706882400).

Almost surely, 2^201010200021 is an apocalyptic number.

It is an amenable number.

201010200021 is a deficient number, since it is larger than the sum of its proper divisors (114299918379).

201010200021 is a wasteful number, since it uses less digits than its factorization.

201010200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437930745 (or 437930739 counting only the distinct ones).

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

Adding to 201010200021 its reverse (120002010102), we get a palindrome (321012210123).

The spelling of 201010200021 in words is "two hundred one billion, ten million, two hundred thousand, twenty-one".