1221002001202 has 16 divisors (see below), whose sum is σ = 1835637804000. Its totient is φ = 609123353472.

The previous prime is 1221002001181. The next prime is 1221002001217. The reversal of 1221002001202 is 2021002001221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3842178 + ... + 4147810.

It is an arithmetic number, because the mean of its divisors is an integer number (114727362750).

Almost surely, 2^{1221002001202} is an apocalyptic number.

1221002001202 is a deficient number, since it is larger than the sum of its proper divisors (614635802798).

1221002001202 is a wasteful number, since it uses less digits than its factorization.

1221002001202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310137.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1221002001202 its reverse (2021002001221), we get a palindrome (3242004002423).

The spelling of 1221002001202 in words is "one trillion, two hundred twenty-one billion, two million, one thousand, two hundred two".