1222022020221 has 16 divisors (see below), whose sum is σ = 1813053683520. Its totient is φ = 813488536080.

The previous prime is 1222022020217. The next prime is 1222022020259. The reversal of 1222022020221 is 1220202202221.

1222022020221 is a `hidden beast` number, since 1 + 2 + 220 + 220 + 2 + 0 + 221 = 666.

It is not a de Polignac number, because 1222022020221 - 2² = 1222022020217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222022020194 and 1222022020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222022028221) 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, 33114850 + ... + 33151731.

It is an arithmetic number, because the mean of its divisors is an integer number (113315855220).

Almost surely, 2^{1222022020221} is an apocalyptic number.

It is an amenable number.

1222022020221 is a deficient number, since it is larger than the sum of its proper divisors (591031663299).

1222022020221 is an equidigital number, since it uses as much as digits as its factorization.

1222022020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66267273 (or 66267267 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1222022020221 its reverse (1220202202221), we get a palindrome (2442224222442).

The spelling of 1222022020221 in words is "one trillion, two hundred twenty-two billion, twenty-two million, twenty thousand, two hundred twenty-one".