21212022012203 has 24 divisors (see below), whose sum is σ = 23741714396400. Its totient is φ = 18932158586880.

The previous prime is 21212022012163. The next prime is 21212022012227. The reversal of 21212022012203 is 30221022021212.

It is not a de Polignac number, because 21212022012203 - 2¹⁴ = 21212021995819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212022012703) 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 23 ways as a sum of consecutive naturals, for example, 3557975 + ... + 7421807.

It is an arithmetic number, because the mean of its divisors is an integer number (989238099850).

Almost surely, 2^{21212022012203} is an apocalyptic number.

21212022012203 is a deficient number, since it is larger than the sum of its proper divisors (2529692384197).

21212022012203 is a wasteful number, since it uses less digits than its factorization.

21212022012203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3864683 (or 3864672 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21212022012203 its reverse (30221022021212), we get a palindrome (51433044033415).

Subtracting 21212022012203 from its reverse (30221022021212), we obtain a palindrome (9009000009009).

The spelling of 21212022012203 in words is "twenty-one trillion, two hundred twelve billion, twenty-two million, twelve thousand, two hundred three".