3121311311012 has 24 divisors (see below), whose sum is σ = 5467051719360. Its totient is φ = 1559297118240.

The previous prime is 3121311311009. The next prime is 3121311311021. The reversal of 3121311311012 is 2101131131213.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22022918 + ... + 22164194.

It is an arithmetic number, because the mean of its divisors is an integer number (227793821640).

Almost surely, 2^{3121311311012} is an apocalyptic number.

It is an amenable number.

3121311311012 is a deficient number, since it is larger than the sum of its proper divisors (2345740408348).

3121311311012 is a wasteful number, since it uses less digits than its factorization.

3121311311012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146051 (or 146049 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 3121311311012 its reverse (2101131131213), we get a palindrome (5222442442225).

The spelling of 3121311311012 in words is "three trillion, one hundred twenty-one billion, three hundred eleven million, three hundred eleven thousand, twelve".