1221020020202 has 16 divisors (see below), whose sum is σ = 1898416656000. Its totient is φ = 588602216928.

The previous prime is 1221020020193. The next prime is 1221020020243. The reversal of 1221020020202 is 2020200201221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96930827 + ... + 96943422.

It is an arithmetic number, because the mean of its divisors is an integer number (118651041000).

Almost surely, 2^{1221020020202} is an apocalyptic number.

1221020020202 is a deficient number, since it is larger than the sum of its proper divisors (677396635798).

1221020020202 is a wasteful number, since it uses less digits than its factorization.

1221020020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193874365.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1221020020202 its reverse (2020200201221), we get a palindrome (3241220221423).

The spelling of 1221020020202 in words is "one trillion, two hundred twenty-one billion, twenty million, twenty thousand, two hundred two".