3121210016 has 24 divisors (see below), whose sum is σ = 6146308224. Its totient is φ = 1560242880.

The previous prime is 3121209991. The next prime is 3121210019. The reversal of 3121210016 is 6100121213.

It is a junction number, because it is equal to n+sod(n) for n = 3121209976 and 3121210003.

It is not an unprimeable number, because it can be changed into a prime (3121210019) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 176891 + ... + 193733.

It is an arithmetic number, because the mean of its divisors is an integer number (256096176).

Almost surely, 2^3121210016 is an apocalyptic number.

It is an amenable number.

3121210016 is a deficient number, since it is larger than the sum of its proper divisors (3025098208).

3121210016 is a wasteful number, since it uses less digits than its factorization.

3121210016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22644 (or 22636 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 3121210016 is about 55867.7905058004. The cubic root of 3121210016 is about 1461.4175910520.

Adding to 3121210016 its reverse (6100121213), we get a palindrome (9221331229).

The spelling of 3121210016 in words is "three billion, one hundred twenty-one million, two hundred ten thousand, sixteen".