1201221110103 has 16 divisors (see below), whose sum is σ = 1830524007936. Its totient is φ = 686377622880.

The previous prime is 1201221110087. The next prime is 1201221110123. The reversal of 1201221110103 is 3010111221021.

It is not a de Polignac number, because 1201221110103 - 2⁴ = 1201221110087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201221110123) 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 15 ways as a sum of consecutive naturals, for example, 1003476 + ... + 1846457.

It is an arithmetic number, because the mean of its divisors is an integer number (114407750496).

Almost surely, 2^{1201221110103} is an apocalyptic number.

1201221110103 is a deficient number, since it is larger than the sum of its proper divisors (629302897833).

1201221110103 is a wasteful number, since it uses less digits than its factorization.

1201221110103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870014.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1201221110103 its reverse (3010111221021), we get a palindrome (4211332331124).

The spelling of 1201221110103 in words is "one trillion, two hundred one billion, two hundred twenty-one million, one hundred ten thousand, one hundred three".