1221102202202 has 16 divisors (see below), whose sum is σ = 2041471175040. Its totient is φ = 544392312768.

The previous prime is 1221102202169. The next prime is 1221102202211. The reversal of 1221102202202 is 2022022011221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 945124898 + ... + 945126189.

It is an arithmetic number, because the mean of its divisors is an integer number (127591948440).

Almost surely, 2^{1221102202202} is an apocalyptic number.

1221102202202 is a deficient number, since it is larger than the sum of its proper divisors (820368972838).

1221102202202 is a wasteful number, since it uses less digits than its factorization.

1221102202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890251125.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1221102202202 its reverse (2022022011221), we get a palindrome (3243124213423).

The spelling of 1221102202202 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred two thousand, two hundred two".