21240233204212 has 216 divisors, whose sum is σ = 44718074436672. Its totient is φ = 8752341427200.

The previous prime is 21240233204189. The next prime is 21240233204213.

21240233204212 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21240233204212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21240233204213) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1509497137 + ... + 1509511207.

It is an arithmetic number, because the mean of its divisors is an integer number (207028122392).

Almost surely, 2^{21240233204212} is an apocalyptic number.

21240233204212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21240233204212 is an abundant number, since it is smaller than the sum of its proper divisors (23477841232460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21240233204212 is a wasteful number, since it uses less digits than its factorization.

21240233204212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14295 (or 14245 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

It can be divided in two parts, 2124023 and 3204212, that added together give a palindrome (5328235).

The spelling of 21240233204212 in words is "twenty-one trillion, two hundred forty billion, two hundred thirty-three million, two hundred four thousand, two hundred twelve".