21212333321212 has 48 divisors (see below), whose sum is σ = 40548641253120. Its totient is φ = 9629503862400.

The previous prime is 21212333321197. The next prime is 21212333321227.

21212333321212 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (21212333321197) and next prime (21212333321227).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342772489 + ... + 342834367.

It is an arithmetic number, because the mean of its divisors is an integer number (844763359440).

Almost surely, 2^{21212333321212} is an apocalyptic number.

21212333321212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21212333321212 is a deficient number, since it is larger than the sum of its proper divisors (19336307931908).

21212333321212 is a wasteful number, since it uses less digits than its factorization.

21212333321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71842 (or 71840 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

It can be divided in two parts, 2121233 and 3321212, that added together give a palindrome (5442445).

The spelling of 21212333321212 in words is "twenty-one trillion, two hundred twelve billion, three hundred thirty-three million, three hundred twenty-one thousand, two hundred twelve".