2103111212112 has 100 divisors (see below), whose sum is σ = 6125785392276. Its totient is φ = 696571799040.

The previous prime is 2103111212107. The next prime is 2103111212117. The reversal of 2103111212112 is 2112121113012.

It is a happy number.

2103111212112 is a `hidden beast` number, since 21 + 0 + 311 + 121 + 211 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (2103111212107) and next prime (2103111212117).

It can be written as a sum of positive squares in 2 ways, for example, as 1530159104016 + 572952108096 = 1236996^2 + 756936^2 .

It is a super-2 number, since 2×2103111212112² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103111212117) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4964589 + ... + 5371532.

Almost surely, 2^{2103111212112} is an apocalyptic number.

It is an amenable number.

2103111212112 is an abundant number, since it is smaller than the sum of its proper divisors (4022674180164).

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

2103111212112 is a wasteful number, since it uses less digits than its factorization.

2103111212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10336298 (or 10336283 counting only the distinct ones).

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

Adding to 2103111212112 its reverse (2112121113012), we get a palindrome (4215232325124).

The spelling of 2103111212112 in words is "two trillion, one hundred three billion, one hundred eleven million, two hundred twelve thousand, one hundred twelve".