212212212101111 has 8 divisors (see below), whose sum is σ = 212789419583664. Its totient is φ = 211635048864960.

The previous prime is 212212212101107. The next prime is 212212212101117. The reversal of 212212212101111 is 111101212212212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212212212101111 - 2² = 212212212101107 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 (212212212101117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444910 + ... + 20652171.

It is an arithmetic number, because the mean of its divisors is an integer number (26598677447958).

Almost surely, 2^{212212212101111} is an apocalyptic number.

212212212101111 is a deficient number, since it is larger than the sum of its proper divisors (577207482553).

212212212101111 is a wasteful number, since it uses less digits than its factorization.

212212212101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22123201.

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

Adding to 212212212101111 its reverse (111101212212212), we get a palindrome (323313424313323).

It can be divided in two parts, 212212212101 and 111, that added together give a palindrome (212212212212).

The spelling of 212212212101111 in words is "two hundred twelve trillion, two hundred twelve billion, two hundred twelve million, one hundred one thousand, one hundred eleven".