212020111111 has 4 divisors (see below), whose sum is σ = 212032954800. Its totient is φ = 212007267424.

The previous prime is 212020111081. The next prime is 212020111117. The reversal of 212020111111 is 111111020212.

It is a happy number.

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 212020111111 - 2⁷ = 212020110983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212020111091 and 212020111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020111117) 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, 6397051 + ... + 6430108.

It is an arithmetic number, because the mean of its divisors is an integer number (53008238700).

Almost surely, 2^212020111111 is an apocalyptic number.

212020111111 is a deficient number, since it is larger than the sum of its proper divisors (12843689).

212020111111 is a wasteful number, since it uses less digits than its factorization.

212020111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12843688.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 212020111111 its reverse (111111020212), we get a palindrome (323131131323).

It can be divided in two parts, 2120201 and 11111, that added together give a palindrome (2131312).

The spelling of 212020111111 in words is "two hundred twelve billion, twenty million, one hundred eleven thousand, one hundred eleven".