2111231011312 has 80 divisors (see below), whose sum is σ = 4341801526560. Its totient is φ = 991728009216.

The previous prime is 2111231011271. The next prime is 2111231011321. The reversal of 2111231011312 is 2131101321112.

It is a super-2 number, since 2×2111231011312² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 2111231011312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18542268 + ... + 18655780.

It is an arithmetic number, because the mean of its divisors is an integer number (54272519082).

Almost surely, 2^{2111231011312} 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 2111231011312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2170900763280).

2111231011312 is an abundant number, since it is smaller than the sum of its proper divisors (2230570515248).

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

2111231011312 is a wasteful number, since it uses less digits than its factorization.

2111231011312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114050 (or 114044 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 2111231011312 its reverse (2131101321112), we get a palindrome (4242332332424).

The spelling of 2111231011312 in words is "two trillion, one hundred eleven billion, two hundred thirty-one million, eleven thousand, three hundred twelve".