212001000111 has 64 divisors (see below), whose sum is σ = 322861593600. Its totient is φ = 137450362752.

The previous prime is 212001000067. The next prime is 212001000143. The reversal of 212001000111 is 111000100212.

It is a happy number.

It is not a de Polignac number, because 212001000111 - 2¹⁸ = 212000737967 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 212001000093 and 212001000102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001000151) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39929725 + ... + 39935033.

It is an arithmetic number, because the mean of its divisors is an integer number (5044712400).

Almost surely, 2^212001000111 is an apocalyptic number.

212001000111 is a deficient number, since it is larger than the sum of its proper divisors (110860593489).

212001000111 is a wasteful number, since it uses less digits than its factorization.

212001000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5677 (or 5671 counting only the distinct ones).

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

Adding to 212001000111 its reverse (111000100212), we get a palindrome (323001100323).

The spelling of 212001000111 in words is "two hundred twelve billion, one million, one hundred eleven", and thus it is an aban number.