1201121103 has 16 divisors (see below), whose sum is σ = 1971070976. Its totient is φ = 633558240.

The previous prime is 1201121099. The next prime is 1201121113. The reversal of 1201121103 is 3011211021.

It is not a de Polignac number, because 1201121103 - 2² = 1201121099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201121113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2199583 + ... + 2200128.

It is an arithmetic number, because the mean of its divisors is an integer number (123191936).

Almost surely, 2^1201121103 is an apocalyptic number.

1201121103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1201121103 is a deficient number, since it is larger than the sum of its proper divisors (769949873).

1201121103 is a wasteful number, since it uses less digits than its factorization.

1201121103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399734.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1201121103 is about 34657.1941016580. The cubic root of 1201121103 is about 1062.9893966535.

Adding to 1201121103 its reverse (3011211021), we get a palindrome (4212332124).

The spelling of 1201121103 in words is "one billion, two hundred one million, one hundred twenty-one thousand, one hundred three".