3121103100 has 144 divisors (see below), whose sum is σ = 9587386368. Its totient is φ = 781224960.

The previous prime is 3121103087. The next prime is 3121103113. The reversal of 3121103100 is 13011213.

It is an interprime number because it is at equal distance from previous prime (3121103087) and next prime (3121103113).

It is a super-2 number, since 2×3121103100² = 19482569121659220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2870757 + ... + 2871843.

It is an arithmetic number, because the mean of its divisors is an integer number (66579072).

Almost surely, 2^3121103100 is an apocalyptic number.

3121103100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121103100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4793693184).

3121103100 is an abundant number, since it is smaller than the sum of its proper divisors (6466283268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121103100 is a wasteful number, since it uses less digits than its factorization.

3121103100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 3121103100 is about 55866.8336314132. The cubic root of 3121103100 is about 1461.4009040720.

Adding to 3121103100 its reverse (13011213), we get a palindrome (3134114313).

The spelling of 3121103100 in words is "three billion, one hundred twenty-one million, one hundred three thousand, one hundred".