20021201221202 has 4 divisors (see below), whose sum is σ = 30031801831806. Its totient is φ = 10010600610600.

The previous prime is 20021201221159. The next prime is 20021201221247. The reversal of 20021201221202 is 20212210212002.

It is a happy number.

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., 10910529065881 + 9110672155321 = 3303109^2 + 3018389^2 .

It is a super-3 number, since 3×20021201221202³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005300305299 + ... + 5005300305302.

Almost surely, 2^{20021201221202} is an apocalyptic number.

20021201221202 is a deficient number, since it is larger than the sum of its proper divisors (10010600610604).

20021201221202 is a wasteful number, since it uses less digits than its factorization.

20021201221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010600610603.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20021201221202 its reverse (20212210212002), we get a palindrome (40233411433204).

The spelling of 20021201221202 in words is "twenty trillion, twenty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred two".