1221110111202 has 8 divisors (see below), whose sum is σ = 2442220222416. Its totient is φ = 407036703732.

The previous prime is 1221110111189. The next prime is 1221110111239. The reversal of 1221110111202 is 2021110111221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1221110111202 is an admirable number.

It is a super-2 number, since 2×1221110111202² (a number of 25 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 101759175928 + ... + 101759175939.

It is an arithmetic number, because the mean of its divisors is an integer number (305277527802).

Almost surely, 2^{1221110111202} is an apocalyptic number.

1221110111202 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1221110111202 is a wasteful number, since it uses less digits than its factorization.

1221110111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203518351872.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1221110111202 its reverse (2021110111221), we get a palindrome (3242220222423).

The spelling of 1221110111202 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, one hundred eleven thousand, two hundred two".