212221202020111 has 4 divisors (see below), whose sum is σ = 212221304731800. Its totient is φ = 212221099308424.

The previous prime is 212221202020049. The next prime is 212221202020117. The reversal of 212221202020111 is 111020202122212.

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 212221202020111 - 2⁹ = 212221202019599 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 (212221202020117) 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, 48191581 + ... + 52410598.

It is an arithmetic number, because the mean of its divisors is an integer number (53055326182950).

Almost surely, 2^{212221202020111} is an apocalyptic number.

212221202020111 is a deficient number, since it is larger than the sum of its proper divisors (102711689).

212221202020111 is a wasteful number, since it uses less digits than its factorization.

212221202020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102711688.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212221202020111 its reverse (111020202122212), we get a palindrome (323241404142323).

The spelling of 212221202020111 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred two million, twenty thousand, one hundred eleven".