1221103112302 has 16 divisors (see below), whose sum is σ = 1934637964560. Its totient is φ = 576443138112.

The previous prime is 1221103112279. The next prime is 1221103112309. The reversal of 1221103112302 is 2032113011221.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1221103112302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221103112309) 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, 54825543 + ... + 54847810.

It is an arithmetic number, because the mean of its divisors is an integer number (120914872785).

Almost surely, 2^{1221103112302} is an apocalyptic number.

1221103112302 is a deficient number, since it is larger than the sum of its proper divisors (713534852258).

1221103112302 is a wasteful number, since it uses less digits than its factorization.

1221103112302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109673667.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1221103112302 its reverse (2032113011221), we get a palindrome (3253216123523).

The spelling of 1221103112302 in words is "one trillion, two hundred twenty-one billion, one hundred three million, one hundred twelve thousand, three hundred two".