1201221323103 has 16 divisors (see below), whose sum is σ = 1604918367360. Its totient is φ = 799170552096.

The previous prime is 1201221323051. The next prime is 1201221323143. The reversal of 1201221323103 is 3013231221021.

It is not a de Polignac number, because 1201221323103 - 2⁹ = 1201221322591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201221323103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201221323143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3548976 + ... + 3872682.

It is an arithmetic number, because the mean of its divisors is an integer number (100307397960).

Almost surely, 2^{1201221323103} is an apocalyptic number.

1201221323103 is a deficient number, since it is larger than the sum of its proper divisors (403697044257).

1201221323103 is a wasteful number, since it uses less digits than its factorization.

1201221323103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326246.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1201221323103 its reverse (3013231221021), we get a palindrome (4214452544124).

The spelling of 1201221323103 in words is "one trillion, two hundred one billion, two hundred twenty-one million, three hundred twenty-three thousand, one hundred three".