212212111010101 has 4 divisors (see below), whose sum is σ = 214313221020204. Its totient is φ = 210111001000000.

The previous prime is 212212111010087. The next prime is 212212111010111. The reversal of 212212111010101 is 101010111212212.

212212111010101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 164550015567025 + 47662095443076 = 12827705^2 + 6903774^2 .

It is a cyclic number.

It is not a de Polignac number, because 212212111010101 - 2⁹ = 212212111009589 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 (212212111010111) 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, 1050555004900 + ... + 1050555005101.

It is an arithmetic number, because the mean of its divisors is an integer number (53578305255051).

Almost surely, 2^{212212111010101} is an apocalyptic number.

It is an amenable number.

212212111010101 is a deficient number, since it is larger than the sum of its proper divisors (2101110010103).

212212111010101 is a wasteful number, since it uses less digits than its factorization.

212212111010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101110010102.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 212212111010101 its reverse (101010111212212), we get a palindrome (313222222222313).

The spelling of 212212111010101 in words is "two hundred twelve trillion, two hundred twelve billion, one hundred eleven million, ten thousand, one hundred one".