3121020103 has 4 divisors (see below), whose sum is σ = 3127971600. Its totient is φ = 3114068608.

The previous prime is 3121020083. The next prime is 3121020137. The reversal of 3121020103 is 3010201213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3010201213 = 17789 ⋅169217.

It is a cyclic number.

It is not a de Polignac number, because 3121020103 - 2²¹ = 3118922951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121020143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3475075 + ... + 3475972.

It is an arithmetic number, because the mean of its divisors is an integer number (781992900).

Almost surely, 2^3121020103 is an apocalyptic number.

3121020103 is a deficient number, since it is larger than the sum of its proper divisors (6951497).

3121020103 is an equidigital number, since it uses as much as digits as its factorization.

3121020103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6951496.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 3121020103 is about 55866.0908154490. The cubic root of 3121020103 is about 1461.3879500018.

Adding to 3121020103 its reverse (3010201213), we get a palindrome (6131221316).

The spelling of 3121020103 in words is "three billion, one hundred twenty-one million, twenty thousand, one hundred three".