1221221112002 has 8 divisors (see below), whose sum is σ = 1840513335312. Its totient is φ = 607716666900.

The previous prime is 1221221111993. The next prime is 1221221112043. The reversal of 1221221112002 is 2002111221221.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 1446944024 + ... + 1446944867.

It is an arithmetic number, because the mean of its divisors is an integer number (230064166914).

Almost surely, 2^{1221221112002} is an apocalyptic number.

1221221112002 is a deficient number, since it is larger than the sum of its proper divisors (619292223310).

1221221112002 is a wasteful number, since it uses less digits than its factorization.

1221221112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893889104.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221221112002 its reverse (2002111221221), we get a palindrome (3223332333223).

The spelling of 1221221112002 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, two".