1221221200022 has 32 divisors (see below), whose sum is σ = 1937945979648. Its totient is φ = 575999491936.

The previous prime is 1221221199977. The next prime is 1221221200093. The reversal of 1221221200022 is 2200021221221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1865468 + ... + 2433600.

It is an arithmetic number, because the mean of its divisors is an integer number (60560811864).

Almost surely, 2^{1221221200022} is an apocalyptic number.

1221221200022 is a deficient number, since it is larger than the sum of its proper divisors (716724779626).

1221221200022 is a wasteful number, since it uses less digits than its factorization.

1221221200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568804.

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

Adding to 1221221200022 its reverse (2200021221221), we get a palindrome (3421242421243).

The spelling of 1221221200022 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, twenty-two".