3111220312172 has 12 divisors (see below), whose sum is σ = 6222440624400. Its totient is φ = 1333380133776.

The previous prime is 3111220312171. The next prime is 3111220312217. The reversal of 3111220312172 is 2712130221113.

3111220312172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

3111220312172 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (3111220312171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55557505547 + ... + 55557505602.

It is an arithmetic number, because the mean of its divisors is an integer number (518536718700).

Almost surely, 2^{3111220312172} is an apocalyptic number.

It is an amenable number.

3111220312172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3111220312172 is a wasteful number, since it uses less digits than its factorization.

3111220312172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111115011160 (or 111115011158 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 3111220312172 its reverse (2712130221113), we get a palindrome (5823350533285).

The spelling of 3111220312172 in words is "three trillion, one hundred eleven billion, two hundred twenty million, three hundred twelve thousand, one hundred seventy-two".