20201221202 has 4 divisors (see below), whose sum is σ = 30301831806. Its totient is φ = 10100610600.

The previous prime is 20201221171. The next prime is 20201221213. The reversal of 20201221202 is 20212210202.

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., 16983041761 + 3218179441 = 130319^2 + 56729^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050305299 + ... + 5050305302.

Almost surely, 2^20201221202 is an apocalyptic number.

20201221202 is a deficient number, since it is larger than the sum of its proper divisors (10100610604).

20201221202 is a wasteful number, since it uses less digits than its factorization.

20201221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100610603.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20201221202 its reverse (20212210202), we get a palindrome (40413431404).

The spelling of 20201221202 in words is "twenty billion, two hundred one million, two hundred twenty-one thousand, two hundred two".