212101112012021 has 4 divisors (see below), whose sum is σ = 212101168585152. Its totient is φ = 212101055438892.

The previous prime is 212101112011993. The next prime is 212101112012093. The reversal of 212101112012021 is 120210211101212.

212101112012021 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, 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 212101112012021 - 2²² = 212101107817717 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 (212101112012221) 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, 22230671 + ... + 30305196.

It is an arithmetic number, because the mean of its divisors is an integer number (53025292146288).

Almost surely, 2^{212101112012021} is an apocalyptic number.

It is an amenable number.

212101112012021 is a deficient number, since it is larger than the sum of its proper divisors (56573131).

212101112012021 is an equidigital number, since it uses as much as digits as its factorization.

212101112012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56573130.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212101112012021 its reverse (120210211101212), we get a palindrome (332311323113233).

The spelling of 212101112012021 in words is "two hundred twelve trillion, one hundred one billion, one hundred twelve million, twelve thousand, twenty-one".