1221210200022 has 16 divisors (see below), whose sum is σ = 2442520097472. Its totient is φ = 407053450440.

The previous prime is 1221210200003. The next prime is 1221210200047. The reversal of 1221210200022 is 2200020121221.

It is a junction number, because it is equal to n+sod(n) for n = 1221210199974 and 1221210200010.

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, 3994348 + ... + 4289199.

It is an arithmetic number, because the mean of its divisors is an integer number (152657506092).

Almost surely, 2^{1221210200022} is an apocalyptic number.

1221210200022 is an abundant number, since it is smaller than the sum of its proper divisors (1221309897450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221210200022 is a wasteful number, since it uses less digits than its factorization.

1221210200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8308123.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1221210200022 its reverse (2200020121221), we get a palindrome (3421230321243).

The spelling of 1221210200022 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, two hundred thousand, twenty-two".