212020221211111 has 4 divisors (see below), whose sum is σ = 212743839713832. Its totient is φ = 211296602708392.

The previous prime is 212020221210979. The next prime is 212020221211121. The reversal of 212020221211111 is 111112122020212.

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 212020221211111 - 2¹¹ = 212020221209063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020221211121) 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, 361809250921 + ... + 361809251506.

It is an arithmetic number, because the mean of its divisors is an integer number (53185959928458).

Almost surely, 2^{212020221211111} is an apocalyptic number.

212020221211111 is a deficient number, since it is larger than the sum of its proper divisors (723618502721).

212020221211111 is an equidigital number, since it uses as much as digits as its factorization.

212020221211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723618502720.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212020221211111 its reverse (111112122020212), we get a palindrome (323132343231323).

The spelling of 212020221211111 in words is "two hundred twelve trillion, twenty billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".