1221000001202 has 32 divisors (see below), whose sum is σ = 2021825664000. Its totient is φ = 550441880208.

The previous prime is 1221000001201. The next prime is 1221000001219. The reversal of 1221000001202 is 2021000001221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1221000001201) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3336188 + ... + 3684039.

It is an arithmetic number, because the mean of its divisors is an integer number (63182052000).

Almost surely, 2^{1221000001202} is an apocalyptic number.

1221000001202 is a deficient number, since it is larger than the sum of its proper divisors (800825662798).

1221000001202 is a wasteful number, since it uses less digits than its factorization.

1221000001202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020470.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1221000001202 its reverse (2021000001221), we get a palindrome (3242000002423).

The spelling of 1221000001202 in words is "one trillion, two hundred twenty-one billion, one thousand, two hundred two".