212212100010021 has 16 divisors (see below), whose sum is σ = 296779659135744. Its totient is φ = 134722345258944.

The previous prime is 212212100010011. The next prime is 212212100010077. The reversal of 212212100010021 is 120010001212212.

It is not a de Polignac number, because 212212100010021 - 2¹³ = 212212100001829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212100010011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20338513090 + ... + 20338523523.

It is an arithmetic number, because the mean of its divisors is an integer number (18548728695984).

Almost surely, 2^{212212100010021} is an apocalyptic number.

It is an amenable number.

212212100010021 is a deficient number, since it is larger than the sum of its proper divisors (84567559125723).

212212100010021 is a wasteful number, since it uses less digits than its factorization.

212212100010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40677036700.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212212100010021 its reverse (120010001212212), we get a palindrome (332222101222233).

The spelling of 212212100010021 in words is "two hundred twelve trillion, two hundred twelve billion, one hundred million, ten thousand, twenty-one".