212012023232021 has 16 divisors (see below), whose sum is σ = 214785602035200. Its totient is φ = 209243706067968.

The previous prime is 212012023231979. The next prime is 212012023232033. The reversal of 212012023232021 is 120232320210212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212012023232021 - 2³⁸ = 211737145325077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012523232021) 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, 859307045 + ... + 859553733.

It is an arithmetic number, because the mean of its divisors is an integer number (13424100127200).

Almost surely, 2^{212012023232021} is an apocalyptic number.

It is an amenable number.

212012023232021 is a deficient number, since it is larger than the sum of its proper divisors (2773578803179).

212012023232021 is a wasteful number, since it uses less digits than its factorization.

212012023232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257308.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 212012023232021 its reverse (120232320210212), we get a palindrome (332244343442233).

The spelling of 212012023232021 in words is "two hundred twelve trillion, twelve billion, twenty-three million, two hundred thirty-two thousand, twenty-one".