20021222100202 has 4 divisors (see below), whose sum is σ = 30031833150306. Its totient is φ = 10010611050100.

The previous prime is 20021222100197. The next prime is 20021222100221. The reversal of 20021222100202 is 20200122212002.

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., 19901243688561 + 119978411641 = 4461081^2 + 346379^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005305525049 + ... + 5005305525052.

Almost surely, 2^{20021222100202} is an apocalyptic number.

20021222100202 is a deficient number, since it is larger than the sum of its proper divisors (10010611050104).

20021222100202 is a wasteful number, since it uses less digits than its factorization.

20021222100202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010611050103.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20021222100202 its reverse (20200122212002), we get a palindrome (40221344312204).

The spelling of 20021222100202 in words is "twenty trillion, twenty-one billion, two hundred twenty-two million, one hundred thousand, two hundred two".