201221002222222 has 4 divisors (see below), whose sum is σ = 301831503333336. Its totient is φ = 100610501111110.

The previous prime is 201221002222193. The next prime is 201221002222241. The reversal of 201221002222222 is 222222200122102.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 201221002222193 and 201221002222202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50305250555554 + ... + 50305250555557.

It is an arithmetic number, because the mean of its divisors is an integer number (75457875833334).

Almost surely, 2^{201221002222222} is an apocalyptic number.

201221002222222 is a deficient number, since it is larger than the sum of its proper divisors (100610501111114).

201221002222222 is a wasteful number, since it uses less digits than its factorization.

201221002222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100610501111113.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 201221002222222 its reverse (222222200122102), we get a palindrome (423443202344324).

It can be divided in two parts, 20122100 and 2222222, that added together give a palindrome (22344322).

The spelling of 201221002222222 in words is "two hundred one trillion, two hundred twenty-one billion, two million, two hundred twenty-two thousand, two hundred twenty-two".