21534222243512 has 48 divisors (see below), whose sum is σ = 44382866665200. Its totient is φ = 9787863254400.

The previous prime is 21534222243491. The next prime is 21534222243557.

21534222243512 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22698437 + ... + 23628107.

It is an arithmetic number, because the mean of its divisors is an integer number (924643055525).

Almost surely, 2^{21534222243512} is an apocalyptic number.

21534222243512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21534222243512 is an abundant number, since it is smaller than the sum of its proper divisors (22848644421688).

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

21534222243512 is a wasteful number, since it uses less digits than its factorization.

21534222243512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953628 (or 953613 counting only the distinct ones).

The product of its digits is 230400, while the sum is 38.

It can be divided in two parts, 2153422 and 2243512, that added together give a palindrome (4396934).

The spelling of 21534222243512 in words is "twenty-one trillion, five hundred thirty-four billion, two hundred twenty-two million, two hundred forty-three thousand, five hundred twelve".