2102321111112 has 128 divisors (see below), whose sum is σ = 5860277529600. Its totient is φ = 698316401664.

The previous prime is 2102321111063. The next prime is 2102321111113. The reversal of 2102321111112 is 2111111232012.

It is a happy number.

2102321111112 is a `hidden beast` number, since 210 + 232 + 1 + 111 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2102321111113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155986518 + ... + 155999994.

It is an arithmetic number, because the mean of its divisors is an integer number (45783418200).

Almost surely, 2^{2102321111112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2102321111112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2930138764800).

2102321111112 is an abundant number, since it is smaller than the sum of its proper divisors (3757956418488).

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

2102321111112 is a wasteful number, since it uses less digits than its factorization.

2102321111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15972 (or 15962 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 2102321111112 its reverse (2111111232012), we get a palindrome (4213432343124).

The spelling of 2102321111112 in words is "two trillion, one hundred two billion, three hundred twenty-one million, one hundred eleven thousand, one hundred twelve".