3121322125 has 8 divisors (see below), whose sum is σ = 3895410168. Its totient is φ = 2497057600.

The previous prime is 3121322119. The next prime is 3121322131. The reversal of 3121322125 is 5212231213.

It is an interprime number because it is at equal distance from previous prime (3121322119) and next prime (3121322131).

It can be written as a sum of positive squares in 4 ways, for example, as 35964009 + 3085358116 = 5997^2 + 55546^2 .

It is not a de Polignac number, because 3121322125 - 2¹³ = 3121313933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121322096 and 3121322105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12485164 + ... + 12485413.

It is an arithmetic number, because the mean of its divisors is an integer number (486926271).

Almost surely, 2^3121322125 is an apocalyptic number.

It is an amenable number.

3121322125 is a deficient number, since it is larger than the sum of its proper divisors (774088043).

3121322125 is an equidigital number, since it uses as much as digits as its factorization.

3121322125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24970592 (or 24970582 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 3121322125 is about 55868.7938387791. The cubic root of 3121322125 is about 1461.4350881233.

Adding to 3121322125 its reverse (5212231213), we get a palindrome (8333553338).

The spelling of 3121322125 in words is "three billion, one hundred twenty-one million, three hundred twenty-two thousand, one hundred twenty-five".