3121021025 has 12 divisors (see below), whose sum is σ = 3907642752. Its totient is φ = 2472573840.

The previous prime is 3121021009. The next prime is 3121021031. The reversal of 3121021025 is 5201201213.

It is a happy number.

It is not a de Polignac number, because 3121021025 - 2⁴ = 3121021009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121020994 and 3121021012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 603449 + ... + 608598.

It is an arithmetic number, because the mean of its divisors is an integer number (325636896).

Almost surely, 2^3121021025 is an apocalyptic number.

It is an amenable number.

3121021025 is a deficient number, since it is larger than the sum of its proper divisors (786621727).

3121021025 is a wasteful number, since it uses less digits than its factorization.

3121021025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212160 (or 1212155 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 3121021025 is about 55866.0990673235. The cubic root of 3121021025 is about 1461.3880939077.

Adding to 3121021025 its reverse (5201201213), we get a palindrome (8322222238).

The spelling of 3121021025 in words is "three billion, one hundred twenty-one million, twenty-one thousand, twenty-five".