21112212120213 has 8 divisors (see below), whose sum is σ = 28228027348800. Its totient is φ = 14035602485888.

The previous prime is 21112212120211. The next prime is 21112212120313. The reversal of 21112212120213 is 31202121221112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21112212120213 - 2¹ = 21112212120211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21112212120213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112212120211) 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 7 ways as a sum of consecutive naturals, for example, 9801397308 + ... + 9801399461.

It is an arithmetic number, because the mean of its divisors is an integer number (3528503418600).

Almost surely, 2^{21112212120213} is an apocalyptic number.

It is an amenable number.

21112212120213 is a deficient number, since it is larger than the sum of its proper divisors (7115815228587).

21112212120213 is a wasteful number, since it uses less digits than its factorization.

21112212120213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19602797131.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 21112212120213 its reverse (31202121221112), we get a palindrome (52314333341325).

The spelling of 21112212120213 in words is "twenty-one trillion, one hundred twelve billion, two hundred twelve million, one hundred twenty thousand, two hundred thirteen".