1221202103002 has 12 divisors (see below), whose sum is σ = 2130873057450. Its totient is φ = 523372329816.

The previous prime is 1221202102979. The next prime is 1221202103083. The reversal of 1221202103002 is 2003012021221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 867451939641 + 353750163361 = 931371^2 + 594769^2 .

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 5 ways as a sum of consecutive naturals, for example, 6230622877 + ... + 6230623072.

Almost surely, 2^{1221202103002} is an apocalyptic number.

1221202103002 is a deficient number, since it is larger than the sum of its proper divisors (909670954448).

1221202103002 is a wasteful number, since it uses less digits than its factorization.

1221202103002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12461245965 (or 12461245958 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1221202103002 its reverse (2003012021221), we get a palindrome (3224214124223).

The spelling of 1221202103002 in words is "one trillion, two hundred twenty-one billion, two hundred two million, one hundred three thousand, two".