1022423221 has 4 divisors (see below), whose sum is σ = 1023882444. Its totient is φ = 1020964000.

The previous prime is 1022423219. The next prime is 1022423243. The reversal of 1022423221 is 1223242201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1223242201 = 229 ⋅5341669.

It can be written as a sum of positive squares in 2 ways, for example, as 711288900 + 311134321 = 26670^2 + 17639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022423221 - 2¹ = 1022423219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022423251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728560 + ... + 729961.

It is an arithmetic number, because the mean of its divisors is an integer number (255970611).

Almost surely, 2^1022423221 is an apocalyptic number.

It is an amenable number.

1022423221 is a deficient number, since it is larger than the sum of its proper divisors (1459223).

1022423221 is an equidigital number, since it uses as much as digits as its factorization.

1022423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459222.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1022423221 is about 31975.3533365935. The cubic root of 1022423221 is about 1007.4192259560.

Adding to 1022423221 its reverse (1223242201), we get a palindrome (2245665422).

The spelling of 1022423221 in words is "one billion, twenty-two million, four hundred twenty-three thousand, two hundred twenty-one".