20221020202 has 4 divisors (see below), whose sum is σ = 30331530306. Its totient is φ = 10110510100.

The previous prime is 20221020139. The next prime is 20221020241. The reversal of 20221020202 is 20202012202.

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

It can be written as a sum of positive squares in only one way, i.e., 17817177361 + 2403842841 = 133481^2 + 49029^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055255049 + ... + 5055255052.

Almost surely, 2^20221020202 is an apocalyptic number.

20221020202 is a deficient number, since it is larger than the sum of its proper divisors (10110510104).

20221020202 is a wasteful number, since it uses less digits than its factorization.

20221020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110510103.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20221020202 its reverse (20202012202), we get a palindrome (40423032404).

The spelling of 20221020202 in words is "twenty billion, two hundred twenty-one million, twenty thousand, two hundred two".