21152336124200 has 48 divisors (see below), whose sum is σ = 49179564194460. Its totient is φ = 8460868608000.

The previous prime is 21152336124197. The next prime is 21152336124203. The reversal of 21152336124200 is 242163325112.

It is an interprime number because it is at equal distance from previous prime (21152336124197) and next prime (21152336124203).

It can be written as a sum of positive squares in 6 ways, for example, as 3189946025764 + 17962390098436 = 1786042^2 + 4238206^2 .

It is a super-2 number, since 2×21152336124200² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21152336124203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31540370 + ... + 32204030.

Almost surely, 2^{21152336124200} is an apocalyptic number.

21152336124200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152336124200 is an abundant number, since it is smaller than the sum of its proper divisors (28027228070260).

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

21152336124200 is a wasteful number, since it uses less digits than its factorization.

21152336124200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823038 (or 823029 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 21152336124200 its reverse (242163325112), we get a palindrome (21394499449312).

The spelling of 21152336124200 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred thirty-six million, one hundred twenty-four thousand, two hundred".