201012021021221 has 16 divisors (see below), whose sum is σ = 204396526224000. Its totient is φ = 197642922335040.

The previous prime is 201012021021197. The next prime is 201012021021223. The reversal of 201012021021221 is 122120120210102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201012021021221 is a prime.

It is a super-3 number, since 3×201012021021221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201012021021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201012021021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 913527011 + ... + 913747023.

It is an arithmetic number, because the mean of its divisors is an integer number (12774782889000).

Almost surely, 2^{201012021021221} is an apocalyptic number.

It is an amenable number.

201012021021221 is a deficient number, since it is larger than the sum of its proper divisors (3384505202779).

201012021021221 is a wasteful number, since it uses less digits than its factorization.

201012021021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254956.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201012021021221 its reverse (122120120210102), we get a palindrome (323132141231323).

The spelling of 201012021021221 in words is "two hundred one trillion, twelve billion, twenty-one million, twenty-one thousand, two hundred twenty-one".