1020220202 has 4 divisors (see below), whose sum is σ = 1530330306. Its totient is φ = 510110100.

The previous prime is 1020220171. The next prime is 1020220207. The reversal of 1020220202 is 2020220201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2020220201 = 19 ⋅106327379.

It can be written as a sum of positive squares in only one way, i.e., 566487601 + 453732601 = 23801^2 + 21301^2 .

It is not an unprimeable number, because it can be changed into a prime (1020220207) 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 as a sum of consecutive naturals, namely, 255055049 + ... + 255055052.

Almost surely, 2^1020220202 is an apocalyptic number.

1020220202 is a deficient number, since it is larger than the sum of its proper divisors (510110104).

1020220202 is an equidigital number, since it uses as much as digits as its factorization.

1020220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510110103.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1020220202 is about 31940.8860553367. The cubic root of 1020220202 is about 1006.6951423656.

Adding to 1020220202 its reverse (2020220201), we get a palindrome (3040440403).

Subtracting 1020220202 from its reverse (2020220201), we obtain a palindrome (999999999).

The spelling of 1020220202 in words is "one billion, twenty million, two hundred twenty thousand, two hundred two".