201210220221021 has 12 divisors (see below), whose sum is σ = 317058528833280. Its totient is φ = 121945588012680.

The previous prime is 201210220220981. The next prime is 201210220221029. The reversal of 201210220221021 is 120122022012102.

It is a happy number.

201210220221021 is a `hidden beast` number, since 2 + 0 + 1 + 210 + 220 + 2 + 210 + 21 = 666.

It is not a de Polignac number, because 201210220221021 - 2⁹ = 201210220220509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201210220220985 and 201210220221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201210220221029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1016213233341 + ... + 1016213233538.

It is an arithmetic number, because the mean of its divisors is an integer number (26421544069440).

Almost surely, 2^{201210220221021} is an apocalyptic number.

It is an amenable number.

201210220221021 is a deficient number, since it is larger than the sum of its proper divisors (115848308612259).

201210220221021 is a wasteful number, since it uses less digits than its factorization.

201210220221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032426466896 (or 2032426466893 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201210220221021 its reverse (120122022012102), we get a palindrome (321332242233123).

The spelling of 201210220221021 in words is "two hundred one trillion, two hundred ten billion, two hundred twenty million, two hundred twenty-one thousand, twenty-one".