2021210032221 has 16 divisors (see below), whose sum is σ = 2994453315520. Its totient is φ = 1347442717680.

The previous prime is 2021210032123. The next prime is 2021210032223. The reversal of 2021210032221 is 1222300121202.

2021210032221 is a `hidden beast` number, since 202 + 1 + 210 + 0 + 32 + 221 = 666.

It is not a de Polignac number, because 2021210032221 - 2¹⁷ = 2021209901149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021210032194 and 2021210032203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021210032223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391446 + ... + 2048328.

It is an arithmetic number, because the mean of its divisors is an integer number (187153332220).

Almost surely, 2^{2021210032221} is an apocalyptic number.

It is an amenable number.

2021210032221 is a deficient number, since it is larger than the sum of its proper divisors (973243283299).

2021210032221 is a wasteful number, since it uses less digits than its factorization.

2021210032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702073 (or 1702067 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2021210032221 its reverse (1222300121202), we get a palindrome (3243510153423).

The spelling of 2021210032221 in words is "two trillion, twenty-one billion, two hundred ten million, thirty-two thousand, two hundred twenty-one".