212201122211111 has 16 divisors (see below), whose sum is σ = 241325558378496. Its totient is φ = 184838816100000.

The previous prime is 212201122211027. The next prime is 212201122211123. The reversal of 212201122211111 is 111112221102212.

It is a happy number.

212201122211111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212201122211111 - 2²⁶ = 212201055102247 is a prime.

It is a super-3 number, since 3×212201122211111³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201122211311) 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, 3080612495 + ... + 3080681376.

It is an arithmetic number, because the mean of its divisors is an integer number (15082847398656).

Almost surely, 2^{212201122211111} is an apocalyptic number.

212201122211111 is a deficient number, since it is larger than the sum of its proper divisors (29124436167385).

212201122211111 is a wasteful number, since it uses less digits than its factorization.

212201122211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6161294014.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 212201122211111 its reverse (111112221102212), we get a palindrome (323313343313323).

The spelling of 212201122211111 in words is "two hundred twelve trillion, two hundred one billion, one hundred twenty-two million, two hundred eleven thousand, one hundred eleven".