21214241212 has 24 divisors (see below), whose sum is σ = 37908251136. Its totient is φ = 10385434368.

The previous prime is 21214241203. The next prime is 21214241219.

21214241212 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214241219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225148 + ... + 305155.

It is an arithmetic number, because the mean of its divisors is an integer number (1579510464).

Almost surely, 2^21214241212 is an apocalyptic number.

It is an amenable number.

21214241212 is a deficient number, since it is larger than the sum of its proper divisors (16694009924).

21214241212 is a wasteful number, since it uses less digits than its factorization.

21214241212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530517 (or 530515 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

The spelling of 21214241212 in words is "twenty-one billion, two hundred fourteen million, two hundred forty-one thousand, two hundred twelve".