21225053315336 has 32 divisors (see below), whose sum is σ = 44336152488600. Its totient is φ = 9458379194880.

The previous prime is 21225053315327. The next prime is 21225053315341. The reversal of 21225053315336 is 63351335052212.

It can be written as a sum of positive squares in 4 ways, for example, as 9101383922500 + 12123669392836 = 3016850^2 + 3481906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21225053315293 and 21225053315302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3518739245 + ... + 3518745276.

Almost surely, 2^{21225053315336} is an apocalyptic number.

21225053315336 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21225053315336 is an abundant number, since it is smaller than the sum of its proper divisors (23111099173264).

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

21225053315336 is a wasteful number, since it uses less digits than its factorization.

21225053315336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037484569 (or 7037484565 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 41.

Adding to 21225053315336 its reverse (63351335052212), we get a palindrome (84576388367548).

The spelling of 21225053315336 in words is "twenty-one trillion, two hundred twenty-five billion, fifty-three million, three hundred fifteen thousand, three hundred thirty-six".