3121100012 has 6 divisors (see below), whose sum is σ = 5461925028. Its totient is φ = 1560550004.

The previous prime is 3121099981. The next prime is 3121100041. The reversal of 3121100012 is 2100011213.

It is a junction number, because it is equal to n+sod(n) for n = 3121099966 and 3121100002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390137498 + ... + 390137505.

It is an arithmetic number, because the mean of its divisors is an integer number (910320838).

Almost surely, 2^3121100012 is an apocalyptic number.

It is an amenable number.

3121100012 is a deficient number, since it is larger than the sum of its proper divisors (2340825016).

3121100012 is a wasteful number, since it uses less digits than its factorization.

3121100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780275007 (or 780275005 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 3121100012 is about 55866.8059942574. The cubic root of 3121100012 is about 1461.4004221048.

Adding to 3121100012 its reverse (2100011213), we get a palindrome (5221111225).

The spelling of 3121100012 in words is "three billion, one hundred twenty-one million, one hundred thousand, twelve".