1221011202202 has 64 divisors (see below), whose sum is σ = 2099918960640. Its totient is φ = 527051448000.

The previous prime is 1221011202193. The next prime is 1221011202217. The reversal of 1221011202202 is 2022021101221.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173361693 + ... + 173368735.

It is an arithmetic number, because the mean of its divisors is an integer number (32811233760).

Almost surely, 2^{1221011202202} is an apocalyptic number.

1221011202202 is a deficient number, since it is larger than the sum of its proper divisors (878907758438).

1221011202202 is a wasteful number, since it uses less digits than its factorization.

1221011202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9499.

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

Adding to 1221011202202 its reverse (2022021101221), we get a palindrome (3243032303423).

The spelling of 1221011202202 in words is "one trillion, two hundred twenty-one billion, eleven million, two hundred two thousand, two hundred two".