20222020001221 has 2 divisors, whose sum is σ = 20222020001222. Its totient is φ = 20222020001220.

The previous prime is 20222020001207. The next prime is 20222020001263. The reversal of 20222020001221 is 12210002022202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20220400824100 + 1619177121 = 4496710^2 + 40239^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222020001221 - 2¹³ = 20222019993029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20222020001195 and 20222020001204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20222020401221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111010000610 + 10111010000611.

It is an arithmetic number, because the mean of its divisors is an integer number (10111010000611).

Almost surely, 2^{20222020001221} is an apocalyptic number.

It is an amenable number.

20222020001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222020001221 is an equidigital number, since it uses as much as digits as its factorization.

20222020001221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20222020001221 its reverse (12210002022202), we get a palindrome (32432022023423).

The spelling of 20222020001221 in words is "twenty trillion, two hundred twenty-two billion, twenty million, one thousand, two hundred twenty-one".