1221002000222 has 16 divisors (see below), whose sum is σ = 1895153364720. Its totient is φ = 589603261632.

The previous prime is 1221002000219. The next prime is 1221002000321. The reversal of 1221002000222 is 2220002001221.

It is a super-2 number, since 2×1221002000222² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221002000197 and 1221002000206.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 79754693 + ... + 79770000.

It is an arithmetic number, because the mean of its divisors is an integer number (118447085295).

Almost surely, 2^{1221002000222} is an apocalyptic number.

1221002000222 is a deficient number, since it is larger than the sum of its proper divisors (674151364498).

1221002000222 is a wasteful number, since it uses less digits than its factorization.

1221002000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159524827.

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

Adding to 1221002000222 its reverse (2220002001221), we get a palindrome (3441004001443).

Subtracting 1221002000222 from its reverse (2220002001221), we obtain a palindrome (999000000999).

The spelling of 1221002000222 in words is "one trillion, two hundred twenty-one billion, two million, two hundred twenty-two", and thus it is an aban number.