212001222201111 has 12 divisors (see below), whose sum is σ = 349970271570192. Its totient is φ = 121143555543456.

The previous prime is 212001222201071. The next prime is 212001222201127. The reversal of 212001222201111 is 111102222100212.

212001222201111 is a `hidden beast` number, since 212 + 0 + 0 + 122 + 220 + 1 + 111 = 666.

It is not a de Polignac number, because 212001222201111 - 2³⁸ = 211726344294167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001222201011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1682549382486 + ... + 1682549382611.

It is an arithmetic number, because the mean of its divisors is an integer number (29164189297516).

Almost surely, 2^{212001222201111} is an apocalyptic number.

212001222201111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212001222201111 is a deficient number, since it is larger than the sum of its proper divisors (137969049369081).

212001222201111 is a wasteful number, since it uses less digits than its factorization.

212001222201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3365098765110 (or 3365098765107 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212001222201111 its reverse (111102222100212), we get a palindrome (323103444301323).

The spelling of 212001222201111 in words is "two hundred twelve trillion, one billion, two hundred twenty-two million, two hundred one thousand, one hundred eleven".