3121221103 has 32 divisors (see below), whose sum is σ = 4197473280. Its totient is φ = 2241423360.

The previous prime is 3121221083. The next prime is 3121221109. The reversal of 3121221103 is 3011221213.

It is not a de Polignac number, because 3121221103 - 2²⁹ = 2584350191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121221109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 725583 + ... + 729871.

It is an arithmetic number, because the mean of its divisors is an integer number (131171040).

Almost surely, 2^3121221103 is an apocalyptic number.

3121221103 is a deficient number, since it is larger than the sum of its proper divisors (1076252177).

3121221103 is a wasteful number, since it uses less digits than its factorization.

3121221103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5047.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 3121221103 is about 55867.8897310432. The cubic root of 3121221103 is about 1461.4193214405.

Adding to 3121221103 its reverse (3011221213), we get a palindrome (6132442316).

The spelling of 3121221103 in words is "three billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred three".