201200012200021 has 4 divisors (see below), whose sum is σ = 201200477477292. Its totient is φ = 201199546922752.

The previous prime is 201200012199943. The next prime is 201200012200091. The reversal of 201200012200021 is 120002210002102.

It is a happy number.

201200012200021 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.

It can be written as a sum of positive squares in 2 ways, for example, as 46732673376900 + 154467338823121 = 6836130^2 + 12428489^2 .

It is a cyclic number.

It is not a de Polignac number, because 201200012200021 - 2³⁹ = 200650256386133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201200012199974 and 201200012200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201200012200091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231989386 + ... + 232855051.

It is an arithmetic number, because the mean of its divisors is an integer number (50300119369323).

Almost surely, 2^{201200012200021} is an apocalyptic number.

It is an amenable number.

201200012200021 is a deficient number, since it is larger than the sum of its proper divisors (465277271).

201200012200021 is an equidigital number, since it uses as much as digits as its factorization.

201200012200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465277270.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201200012200021 its reverse (120002210002102), we get a palindrome (321202222202123).

The spelling of 201200012200021 in words is "two hundred one trillion, two hundred billion, twelve million, two hundred thousand, twenty-one".