2321212110021 has 24 divisors (see below), whose sum is σ = 3935405520384. Its totient is φ = 1290558083040.

The previous prime is 2321212109987. The next prime is 2321212110073. The reversal of 2321212110021 is 1200112121232.

2321212110021 is a `hidden beast` number, since 2 + 321 + 212 + 110 + 0 + 21 = 666.

It is not a de Polignac number, because 2321212110021 - 2¹⁰ = 2321212108997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2321212109976 and 2321212110003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321212110521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 497898165 + ... + 497902826.

It is an arithmetic number, because the mean of its divisors is an integer number (163975230016).

Almost surely, 2^{2321212110021} is an apocalyptic number.

2321212110021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2321212110021 is a deficient number, since it is larger than the sum of its proper divisors (1614193410363).

2321212110021 is a wasteful number, since it uses less digits than its factorization.

2321212110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995801041 (or 995801038 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2321212110021 its reverse (1200112121232), we get a palindrome (3521324231253).

The spelling of 2321212110021 in words is "two trillion, three hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, twenty-one".