2111312140 has 48 divisors (see below), whose sum is σ = 5287468032. Its totient is φ = 692404416.

The previous prime is 2111312087. The next prime is 2111312153. The reversal of 2111312140 is 412131112.

It is a super-2 number, since 2×2111312140² = 8915277905022759200, which contains 22 as substring.

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, 324624 + ... + 331063.

It is an arithmetic number, because the mean of its divisors is an integer number (110155584).

Almost surely, 2^2111312140 is an apocalyptic number.

2111312140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111312140 is an abundant number, since it is smaller than the sum of its proper divisors (3176155892).

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

2111312140 is a wasteful number, since it uses less digits than its factorization.

2111312140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655726 (or 655724 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 2111312140 is about 45949.0167468250. The cubic root of 2111312140 is about 1282.8744280756.

Adding to 2111312140 its reverse (412131112), we get a palindrome (2523443252).

The spelling of 2111312140 in words is "two billion, one hundred eleven million, three hundred twelve thousand, one hundred forty".