21212120120003 has 8 divisors (see below), whose sum is σ = 22340003946000. Its totient is φ = 20085381939168.

The previous prime is 21212120119961. The next prime is 21212120120011. The reversal of 21212120120003 is 30002102121212.

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 21212120120003 - 2¹⁰ = 21212120118979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212120126003) 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, 286373276 + ... + 286447337.

It is an arithmetic number, because the mean of its divisors is an integer number (2792500493250).

Almost surely, 2^{21212120120003} is an apocalyptic number.

21212120120003 is a deficient number, since it is larger than the sum of its proper divisors (1127883825997).

21212120120003 is a wasteful number, since it uses less digits than its factorization.

21212120120003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572822581.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21212120120003 its reverse (30002102121212), we get a palindrome (51214222241215).

The spelling of 21212120120003 in words is "twenty-one trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty thousand, three".