211111140 has 48 divisors (see below), whose sum is σ = 594115200. Its totient is φ = 56010240.

The previous prime is 211111133. The next prime is 211111141. The reversal of 211111140 is 41111112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (211111141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3100 + ... + 20780.

It is an arithmetic number, because the mean of its divisors is an integer number (12377400).

Almost surely, 2^211111140 is an apocalyptic number.

211111140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211111140 is an abundant number, since it is smaller than the sum of its proper divisors (383004060).

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

211111140 is a wasteful number, since it uses less digits than its factorization.

211111140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17892 (or 17890 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 211111140 is about 14529.6641392704. The cubic root of 211111140 is about 595.4386897297.

Adding to 211111140 its reverse (41111112), we get a palindrome (252222252).

The spelling of 211111140 in words is "two hundred eleven million, one hundred eleven thousand, one hundred forty".