1221101022103 has 8 divisors (see below), whose sum is σ = 1232593246368. Its totient is φ = 1209659761824.

The previous prime is 1221101022091. The next prime is 1221101022109. The reversal of 1221101022103 is 3012201011221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221101022103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221101022109) by changing a digit.

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, 12692851 + ... + 12788692.

It is an arithmetic number, because the mean of its divisors is an integer number (154074155796).

Almost surely, 2^{1221101022103} is an apocalyptic number.

1221101022103 is a deficient number, since it is larger than the sum of its proper divisors (11492224265).

1221101022103 is a wasteful number, since it uses less digits than its factorization.

1221101022103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25481993.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1221101022103 its reverse (3012201011221), we get a palindrome (4233302033324).

The spelling of 1221101022103 in words is "one trillion, two hundred twenty-one billion, one hundred one million, twenty-two thousand, one hundred three".