201200220021 has 4 divisors (see below), whose sum is σ = 268266960032. Its totient is φ = 134133480012.

The previous prime is 201200219993. The next prime is 201200220041. The reversal of 201200220021 is 120022002102.

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 not a de Polignac number, because 201200220021 - 2⁹ = 201200219509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201200219979 and 201200220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201200220041) 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, 33533370001 + ... + 33533370006.

It is an arithmetic number, because the mean of its divisors is an integer number (67066740008).

Almost surely, 2^201200220021 is an apocalyptic number.

It is an amenable number.

201200220021 is a deficient number, since it is larger than the sum of its proper divisors (67066740011).

201200220021 is an equidigital number, since it uses as much as digits as its factorization.

201200220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67066740010.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 201200220021 its reverse (120022002102), we get a palindrome (321222222123).

The spelling of 201200220021 in words is "two hundred one billion, two hundred million, two hundred twenty thousand, twenty-one".