3111221220112 has 80 divisors (see below), whose sum is σ = 6080233161600. Its totient is φ = 1542197200896.

The previous prime is 3111221220101. The next prime is 3111221220139. The reversal of 3111221220112 is 2110221221113.

It is a self number, because there is not a number n which added to its sum of digits gives 3111221220112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1287223128 + ... + 1287225544.

It is an arithmetic number, because the mean of its divisors is an integer number (76002914520).

Almost surely, 2^{3111221220112} is an apocalyptic number.

It is an amenable number.

3111221220112 is a deficient number, since it is larger than the sum of its proper divisors (2969011941488).

3111221220112 is a wasteful number, since it uses less digits than its factorization.

3111221220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3920 (or 3914 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 3111221220112 its reverse (2110221221113), we get a palindrome (5221442441225).

It can be divided in two parts, 3111221 and 220112, that added together give a palindrome (3331333).

The spelling of 3111221220112 in words is "three trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twelve".