212201122221111 has 16 divisors (see below), whose sum is σ = 299578522620384. Its totient is φ = 133145594302464.

The previous prime is 212201122221107. The next prime is 212201122221259. The reversal of 212201122221111 is 111122221102212.

It is not a de Polignac number, because 212201122221111 - 2² = 212201122221107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201122221911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33852391 + ... + 39628103.

It is an arithmetic number, because the mean of its divisors is an integer number (18723657663774).

Almost surely, 2^{212201122221111} is an apocalyptic number.

212201122221111 is a deficient number, since it is larger than the sum of its proper divisors (87377400399273).

212201122221111 is a wasteful number, since it uses less digits than its factorization.

212201122221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6496130.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212201122221111 its reverse (111122221102212), we get a palindrome (323323343323323).

The spelling of 212201122221111 in words is "two hundred twelve trillion, two hundred one billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred eleven".