212010111 has 36 divisors (see below), whose sum is σ = 334254232. Its totient is φ = 129371904.

The previous prime is 212010107. The next prime is 212010119. The reversal of 212010111 is 111010212.

It is a happy number.

212010111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212010111 - 2² = 212010107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212010093 and 212010102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212010119) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 95136 + ... + 97338.

Almost surely, 2^212010111 is an apocalyptic number.

212010111 is a deficient number, since it is larger than the sum of its proper divisors (122244121).

212010111 is a wasteful number, since it uses less digits than its factorization.

212010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 212010111 is about 14560.5669875867. The cubic root of 212010111 is about 596.2826750549.

Adding to 212010111 its reverse (111010212), we get a palindrome (323020323).

The spelling of 212010111 in words is "two hundred twelve million, ten thousand, one hundred eleven".