212112201212021 has 4 divisors (see below), whose sum is σ = 231395128594944. Its totient is φ = 192829273829100.

The previous prime is 212112201211997. The next prime is 212112201212033. The reversal of 212112201212021 is 120212102211212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212112201212021 - 2⁶ = 212112201211957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212112201211984 and 212112201212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112201212921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9641463691445 + ... + 9641463691466.

It is an arithmetic number, because the mean of its divisors is an integer number (57848782148736).

Almost surely, 2^{212112201212021} is an apocalyptic number.

It is an amenable number.

212112201212021 is a deficient number, since it is larger than the sum of its proper divisors (19282927382923).

212112201212021 is a wasteful number, since it uses less digits than its factorization.

212112201212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19282927382922.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212112201212021 its reverse (120212102211212), we get a palindrome (332324303423233).

The spelling of 212112201212021 in words is "two hundred twelve trillion, one hundred twelve billion, two hundred one million, two hundred twelve thousand, twenty-one".