212001031111 has 4 divisors (see below), whose sum is σ = 212064148800. Its totient is φ = 211937913424.

The previous prime is 212001031093. The next prime is 212001031129. The reversal of 212001031111 is 111130100212.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (212001031093) and next prime (212001031129).

It is a cyclic number.

It is not a de Polignac number, because 212001031111 - 2³⁵ = 177641292743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212001031091 and 212001031100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001011111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31553806 + ... + 31560523.

It is an arithmetic number, because the mean of its divisors is an integer number (53016037200).

Almost surely, 2^212001031111 is an apocalyptic number.

212001031111 is a deficient number, since it is larger than the sum of its proper divisors (63117689).

212001031111 is an equidigital number, since it uses as much as digits as its factorization.

212001031111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63117688.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 212001031111 its reverse (111130100212), we get a palindrome (323131131323).

The spelling of 212001031111 in words is "two hundred twelve billion, one million, thirty-one thousand, one hundred eleven".