211123243140 has 48 divisors (see below), whose sum is σ = 596998019520. Its totient is φ = 55742108800.

The previous prime is 211123243139. The next prime is 211123243187. The reversal of 211123243140 is 41342321112.

It is a self number, because there is not a number n which added to its sum of digits gives 211123243140.

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, 17413350 + ... + 17425469.

It is an arithmetic number, because the mean of its divisors is an integer number (12437458740).

Almost surely, 2^211123243140 is an apocalyptic number.

211123243140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211123243140 is an abundant number, since it is smaller than the sum of its proper divisors (385874776380).

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

211123243140 is a wasteful number, since it uses less digits than its factorization.

211123243140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34838932 (or 34838930 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 211123243140 its reverse (41342321112), we get a palindrome (252465564252).

The spelling of 211123243140 in words is "two hundred eleven billion, one hundred twenty-three million, two hundred forty-three thousand, one hundred forty".