1221220002102 has 8 divisors (see below), whose sum is σ = 2442440004216. Its totient is φ = 407073334032.

The previous prime is 1221220002091. The next prime is 1221220002103. The reversal of 1221220002102 is 2012000221221.

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

1221220002102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221220002103) by changing a digit.

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, 101768333503 + ... + 101768333514.

It is an arithmetic number, because the mean of its divisors is an integer number (305305000527).

Almost surely, 2^{1221220002102} is an apocalyptic number.

1221220002102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1221220002102 is a wasteful number, since it uses less digits than its factorization.

1221220002102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203536667022.

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

Adding to 1221220002102 its reverse (2012000221221), we get a palindrome (3233220223323).

The spelling of 1221220002102 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, two thousand, one hundred two".