3121320125 has 32 divisors (see below), whose sum is σ = 4856626944. Its totient is φ = 1945752000.

The previous prime is 3121320113. The next prime is 3121320187. The reversal of 3121320125 is 5210231213.

3121320125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3121320125 - 2⁶ = 3121320061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121320097 and 3121320106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152522 + ... + 171771.

It is an arithmetic number, because the mean of its divisors is an integer number (151769592).

Almost surely, 2^3121320125 is an apocalyptic number.

3121320125 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3121320125 is a deficient number, since it is larger than the sum of its proper divisors (1735306819).

3121320125 is a wasteful number, since it uses less digits than its factorization.

3121320125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324326 (or 324316 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 3121320125 is about 55868.7759396964. The cubic root of 3121320125 is about 1461.4347759831.

Adding to 3121320125 its reverse (5210231213), we get a palindrome (8331551338).

The spelling of 3121320125 in words is "three billion, one hundred twenty-one million, three hundred twenty thousand, one hundred twenty-five".