3121210012 has 6 divisors (see below), whose sum is σ = 5462117528. Its totient is φ = 1560605004.

The previous prime is 3121209991. The next prime is 3121210019. The reversal of 3121210012 is 2100121213.

It is a junction number, because it is equal to n+sod(n) for n = 3121209974 and 3121210001.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390151248 + ... + 390151255.

Almost surely, 2^3121210012 is an apocalyptic number.

It is an amenable number.

3121210012 is a deficient number, since it is larger than the sum of its proper divisors (2340907516).

3121210012 is a wasteful number, since it uses less digits than its factorization.

3121210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780302507 (or 780302505 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 3121210012 is about 55867.7904700016. The cubic root of 3121210012 is about 1461.4175904277.

Adding to 3121210012 its reverse (2100121213), we get a palindrome (5221331225).

The spelling of 3121210012 in words is "three billion, one hundred twenty-one million, two hundred ten thousand, twelve".