212102122020011 has 4 divisors (see below), whose sum is σ = 212103346455000. Its totient is φ = 212100897585024.

The previous prime is 212102122019989. The next prime is 212102122020049. The reversal of 212102122020011 is 110020221201212.

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

It is a cyclic number.

It is not a de Polignac number, because 212102122020011 - 2²⁶ = 212102054911147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212102122020091) 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, 611957621 + ... + 612304118.

It is an arithmetic number, because the mean of its divisors is an integer number (53025836613750).

Almost surely, 2^{212102122020011} is an apocalyptic number.

212102122020011 is a deficient number, since it is larger than the sum of its proper divisors (1224434989).

212102122020011 is a wasteful number, since it uses less digits than its factorization.

212102122020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224434988.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212102122020011 its reverse (110020221201212), we get a palindrome (322122343221223).

The spelling of 212102122020011 in words is "two hundred twelve trillion, one hundred two billion, one hundred twenty-two million, twenty thousand, eleven".