212140111 has 4 divisors (see below), whose sum is σ = 223305400. Its totient is φ = 200974824.

The previous prime is 212140087. The next prime is 212140121. The reversal of 212140111 is 111041212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212140111 - 2¹⁹ = 211615823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212140091 and 212140100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212140121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5582616 + ... + 5582653.

It is an arithmetic number, because the mean of its divisors is an integer number (55826350).

Almost surely, 2^212140111 is an apocalyptic number.

212140111 is a deficient number, since it is larger than the sum of its proper divisors (11165289).

212140111 is a wasteful number, since it uses less digits than its factorization.

212140111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11165288.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 212140111 is about 14565.0304153476. The cubic root of 212140111 is about 596.4045260191.

Adding to 212140111 its reverse (111041212), we get a palindrome (323181323).

The spelling of 212140111 in words is "two hundred twelve million, one hundred forty thousand, one hundred eleven".