2122021210221 has 24 divisors (see below), whose sum is σ = 3343901333760. Its totient is φ = 1286031024000.

The previous prime is 2122021210213. The next prime is 2122021210259. The reversal of 2122021210221 is 1220121202212.

It is a happy number.

2122021210221 is a `hidden beast` number, since 2 + 1 + 220 + 212 + 10 + 221 = 666.

It is not a de Polignac number, because 2122021210221 - 2³ = 2122021210213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2122021210194 and 2122021210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122021211221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2803396 + ... + 3478946.

It is an arithmetic number, because the mean of its divisors is an integer number (139329222240).

Almost surely, 2^{2122021210221} is an apocalyptic number.

It is an amenable number.

2122021210221 is a deficient number, since it is larger than the sum of its proper divisors (1221880123539).

2122021210221 is a wasteful number, since it uses less digits than its factorization.

2122021210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707297 (or 707294 counting only the distinct ones).

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

Adding to 2122021210221 its reverse (1220121202212), we get a palindrome (3342142412433).

The spelling of 2122021210221 in words is "two trillion, one hundred twenty-two billion, twenty-one million, two hundred ten thousand, two hundred twenty-one".