3121330204225 has 12 divisors (see below), whose sum is σ = 3870477323820. Its totient is φ = 2497046182400.

The previous prime is 3121330204211. The next prime is 3121330204337. The reversal of 3121330204225 is 5224020331213.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3435952689 + 3117894251536 = 58617^2 + 1765756^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3121330204225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3121330204193 and 3121330204202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3927321 + ... + 4654729.

It is an arithmetic number, because the mean of its divisors is an integer number (322539776985).

Almost surely, 2^{3121330204225} is an apocalyptic number.

It is an amenable number.

3121330204225 is a deficient number, since it is larger than the sum of its proper divisors (749147119595).

3121330204225 is a wasteful number, since it uses less digits than its factorization.

3121330204225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899060 (or 899055 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 3121330204225 its reverse (5224020331213), we get a palindrome (8345350535438).

The spelling of 3121330204225 in words is "three trillion, one hundred twenty-one billion, three hundred thirty million, two hundred four thousand, two hundred twenty-five".