1022320021 has 4 divisors (see below), whose sum is σ = 1041609132. Its totient is φ = 1003030912.

The previous prime is 1022320009. The next prime is 1022320063. The reversal of 1022320021 is 1200232201.

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 722856996 + 299463025 = 26886^2 + 17305^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022320021 - 2¹⁷ = 1022188949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022319983 and 1022320010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022320001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9644476 + ... + 9644581.

It is an arithmetic number, because the mean of its divisors is an integer number (260402283).

Almost surely, 2^1022320021 is an apocalyptic number.

It is an amenable number.

1022320021 is a deficient number, since it is larger than the sum of its proper divisors (19289111).

1022320021 is an equidigital number, since it uses as much as digits as its factorization.

1022320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19289110.

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

The square root of 1022320021 is about 31973.7395529519. The cubic root of 1022320021 is about 1007.3853296333.

Adding to 1022320021 its reverse (1200232201), we get a palindrome (2222552222).

The spelling of 1022320021 in words is "one billion, twenty-two million, three hundred twenty thousand, twenty-one".