1221002221202 has 8 divisors (see below), whose sum is σ = 1832050549296. Its totient is φ = 610318704772.

The previous prime is 1221002221169. The next prime is 1221002221223. The reversal of 1221002221202 is 2021222001221.

It is a happy number.

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, 91194548 + ... + 91207935.

It is an arithmetic number, because the mean of its divisors is an integer number (229006318662).

Almost surely, 2^{1221002221202} is an apocalyptic number.

1221002221202 is a deficient number, since it is larger than the sum of its proper divisors (611048328094).

1221002221202 is a wasteful number, since it uses less digits than its factorization.

1221002221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182405832.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1221002221202 its reverse (2021222001221), we get a palindrome (3242224222423).

The spelling of 1221002221202 in words is "one trillion, two hundred twenty-one billion, two million, two hundred twenty-one thousand, two hundred two".