1221200202202 has 16 divisors (see below), whose sum is σ = 1836159622272. Its totient is φ = 609147164160.

The previous prime is 1221200202191. The next prime is 1221200202223. The reversal of 1221200202202 is 2022020021221.

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 7 ways as a sum of consecutive naturals, for example, 19970458 + ... + 20031514.

It is an arithmetic number, because the mean of its divisors is an integer number (114759976392).

Almost surely, 2^{1221200202202} is an apocalyptic number.

1221200202202 is a deficient number, since it is larger than the sum of its proper divisors (614959420070).

1221200202202 is a wasteful number, since it uses less digits than its factorization.

1221200202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84693.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1221200202202 its reverse (2022020021221), we get a palindrome (3243220223423).

The spelling of 1221200202202 in words is "one trillion, two hundred twenty-one billion, two hundred million, two hundred two thousand, two hundred two".