22212220222021 has 2 divisors, whose sum is σ = 22212220222022. Its totient is φ = 22212220222020.

The previous prime is 22212220222013. The next prime is 22212220222043. The reversal of 22212220222021 is 12022202221222.

It is an a-pointer prime, because the next prime (22212220222043) can be obtained adding 22212220222021 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22165169840100 + 47050381921 = 4707990^2 + 216911^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212220222021 - 2³ = 22212220222013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22212220221983 and 22212220222001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212220222051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106110111010 + 11106110111011.

It is an arithmetic number, because the mean of its divisors is an integer number (11106110111011).

Almost surely, 2^{22212220222021} is an apocalyptic number.

It is an amenable number.

22212220222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212220222021 is an equidigital number, since it uses as much as digits as its factorization.

22212220222021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 22212220222021 its reverse (12022202221222), we get a palindrome (34234422443243).

The spelling of 22212220222021 in words is "twenty-two trillion, two hundred twelve billion, two hundred twenty million, two hundred twenty-two thousand, twenty-one".