1002220001 has 2 divisors, whose sum is σ = 1002220002. Its totient is φ = 1002220000.

The previous prime is 1002219979. The next prime is 1002220033. The reversal of 1002220001 is 1000222001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 905709025 + 96510976 = 30095^2 + 9824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002220001 - 2¹⁴ = 1002203617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1002220061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501110000 + 501110001.

It is an arithmetic number, because the mean of its divisors is an integer number (501110001).

Almost surely, 2^1002220001 is an apocalyptic number.

It is an amenable number.

1002220001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002220001 is an equidigital number, since it uses as much as digits as its factorization.

1002220001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1002220001 is about 31657.8584398882. The cubic root of 1002220001 is about 1000.7394534072.

Adding to 1002220001 its reverse (1000222001), we get a palindrome (2002442002).

It can be divided in two parts, 100222000 and 1, that added together give a palindrome (100222001).

The spelling of 1002220001 in words is "one billion, two million, two hundred twenty thousand, one".