1221221210002 has 16 divisors (see below), whose sum is σ = 1838966976000. Its totient is φ = 608232647872.

The previous prime is 1221221209997. The next prime is 1221221210071. The reversal of 1221221210002 is 2000121221221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5906874 + ... + 6110122.

It is an arithmetic number, because the mean of its divisors is an integer number (114935436000).

Almost surely, 2^{1221221210002} is an apocalyptic number.

1221221210002 is a deficient number, since it is larger than the sum of its proper divisors (617745765998).

1221221210002 is a wasteful number, since it uses less digits than its factorization.

1221221210002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214937.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221221210002 its reverse (2000121221221), we get a palindrome (3221342431223).

The spelling of 1221221210002 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, two".