1221002221103 has 8 divisors (see below), whose sum is σ = 1396153772160. Its totient is φ = 1046031335640.

The previous prime is 1221002221097. The next prime is 1221002221169. The reversal of 1221002221103 is 3011222001221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221002221103 - 2²⁰ = 1221001172527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221002221403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45151913 + ... + 45178946.

It is an arithmetic number, because the mean of its divisors is an integer number (174519221520).

Almost surely, 2^{1221002221103} is an apocalyptic number.

1221002221103 is a deficient number, since it is larger than the sum of its proper divisors (175151551057).

1221002221103 is an equidigital number, since it uses as much as digits as its factorization.

1221002221103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90332797.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1221002221103 its reverse (3011222001221), we get a palindrome (4232224222324).

The spelling of 1221002221103 in words is "one trillion, two hundred twenty-one billion, two million, two hundred twenty-one thousand, one hundred three".