21214244241212 has 18 divisors (see below), whose sum is σ = 40806738407064. Its totient is φ = 9642838291240.

The previous prime is 21214244241199. The next prime is 21214244241331.

21214244241212 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×21214244241212³ (a number of 41 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21915541088 + ... + 21915542055.

Almost surely, 2^{21214244241212} is an apocalyptic number.

21214244241212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21214244241212 is a deficient number, since it is larger than the sum of its proper divisors (19592494165852).

21214244241212 is a wasteful number, since it uses less digits than its factorization.

21214244241212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43831083169 (or 43831083156 counting only the distinct ones).

The product of its digits is 16384, while the sum is 32.

It can be divided in two parts, 2121424 and 4241212, that added together give a palindrome (6362636).

The spelling of 21214244241212 in words is "twenty-one trillion, two hundred fourteen billion, two hundred forty-four million, two hundred forty-one thousand, two hundred twelve".