1320022021 has 2 divisors, whose sum is σ = 1320022022. Its totient is φ = 1320022020.

The previous prime is 1320022013. The next prime is 1320022031. The reversal of 1320022021 is 1202200231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1129968225 + 190053796 = 33615^2 + 13786^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320022021 - 2³ = 1320022013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320021992 and 1320022010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320022031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660011010 + 660011011.

It is an arithmetic number, because the mean of its divisors is an integer number (660011011).

Almost surely, 2^1320022021 is an apocalyptic number.

It is an amenable number.

1320022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320022021 is an equidigital number, since it uses as much as digits as its factorization.

1320022021 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 1320022021 is about 36332.1073019444. The cubic root of 1320022021 is about 1096.9674104993.

Adding to 1320022021 its reverse (1202200231), we get a palindrome (2522222252).

The spelling of 1320022021 in words is "one billion, three hundred twenty million, twenty-two thousand, twenty-one".