1022225221 has 4 divisors (see below), whose sum is σ = 1022383692. Its totient is φ = 1022066752.

The previous prime is 1022225219. The next prime is 1022225291. The reversal of 1022225221 is 1225222201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 656076996 + 366148225 = 25614^2 + 19135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022225221 - 2¹ = 1022225219 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 (1022225201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69130 + ... + 82603.

It is an arithmetic number, because the mean of its divisors is an integer number (255595923).

Almost surely, 2^1022225221 is an apocalyptic number.

It is an amenable number.

1022225221 is a deficient number, since it is larger than the sum of its proper divisors (158471).

1022225221 is an equidigital number, since it uses as much as digits as its factorization.

1022225221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158470.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1022225221 is about 31972.2570520131. The cubic root of 1022225221 is about 1007.3541903034.

Adding to 1022225221 its reverse (1225222201), we get a palindrome (2247447422).

The spelling of 1022225221 in words is "one billion, twenty-two million, two hundred twenty-five thousand, two hundred twenty-one".