201210200200021 has 8 divisors (see below), whose sum is σ = 214223144577624. Its totient is φ = 188328039183360.

The previous prime is 201210200200019. The next prime is 201210200200049. The reversal of 201210200200021 is 120002002012102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13755382880625 + 187454817319396 = 3708825^2 + 13691414^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201210200200021 - 2¹ = 201210200200019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201210200199974 and 201210200200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201210200200001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32695837060 + ... + 32695843213.

It is an arithmetic number, because the mean of its divisors is an integer number (26777893072203).

Almost surely, 2^{201210200200021} is an apocalyptic number.

It is an amenable number.

201210200200021 is a deficient number, since it is larger than the sum of its proper divisors (13012944377603).

201210200200021 is a wasteful number, since it uses less digits than its factorization.

201210200200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65391680471.

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

Adding to 201210200200021 its reverse (120002002012102), we get a palindrome (321212202212123).

The spelling of 201210200200021 in words is "two hundred one trillion, two hundred ten billion, two hundred million, two hundred thousand, twenty-one".