1221102122202 has 48 divisors (see below), whose sum is σ = 2744080116960. Its totient is φ = 406979273232.

The previous prime is 1221102122179. The next prime is 1221102122221. The reversal of 1221102122202 is 2022212011221.

It is a happy number.

1221102122202 is a `hidden beast` number, since 1 + 221 + 10 + 212 + 220 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 3529824 + ... + 3860292.

It is an arithmetic number, because the mean of its divisors is an integer number (57168335770).

Almost surely, 2^{1221102122202} is an apocalyptic number.

1221102122202 is an abundant number, since it is smaller than the sum of its proper divisors (1522977994758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221102122202 is an equidigital number, since it uses as much as digits as its factorization.

1221102122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338089 (or 338077 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1221102122202 its reverse (2022212011221), we get a palindrome (3243314133423).

The spelling of 1221102122202 in words is "one trillion, two hundred twenty-one billion, one hundred two million, one hundred twenty-two thousand, two hundred two".