1222030021 has 2 divisors, whose sum is σ = 1222030022. Its totient is φ = 1222030020.

The previous prime is 1222029979. The next prime is 1222030039. The reversal of 1222030021 is 1200302221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081488996 + 140541025 = 32886^2 + 11855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222030021 - 2²⁷ = 1087812293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222029983 and 1222030010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222030081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611015010 + 611015011.

It is an arithmetic number, because the mean of its divisors is an integer number (611015011).

Almost surely, 2^1222030021 is an apocalyptic number.

It is an amenable number.

1222030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222030021 is an equidigital number, since it uses as much as digits as its factorization.

1222030021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1222030021 is about 34957.5459808036. The cubic root of 1222030021 is about 1069.1220623316.

Adding to 1222030021 its reverse (1200302221), we get a palindrome (2422332242).

The spelling of 1222030021 in words is "one billion, two hundred twenty-two million, thirty thousand, twenty-one".