212102011122121 has 16 divisors (see below), whose sum is σ = 222605142471936. Its totient is φ = 201705676000576.

The previous prime is 212102011122119. The next prime is 212102011122173. The reversal of 212102011122121 is 121221110201212.

It is a happy number.

212102011122121 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 212102011122121 - 2¹ = 212102011122119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212102011722121) 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, 735266511 + ... + 735554923.

It is an arithmetic number, because the mean of its divisors is an integer number (13912821404496).

Almost surely, 2^{212102011122121} is an apocalyptic number.

It is an amenable number.

212102011122121 is a deficient number, since it is larger than the sum of its proper divisors (10503131349815).

212102011122121 is a wasteful number, since it uses less digits than its factorization.

212102011122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473432.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212102011122121 its reverse (121221110201212), we get a palindrome (333323121323333).

The spelling of 212102011122121 in words is "two hundred twelve trillion, one hundred two billion, eleven million, one hundred twenty-two thousand, one hundred twenty-one".