21441512345200 has 60 divisors (see below), whose sum is σ = 51530895875320. Its totient is φ = 8573664257280.

The previous prime is 21441512345171. The next prime is 21441512345219. The reversal of 21441512345200 is 254321514412.

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, 8021370 + ... + 10354969.

Almost surely, 2^{21441512345200} is an apocalyptic number.

21441512345200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21441512345200 is an abundant number, since it is smaller than the sum of its proper divisors (30089383530120).

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

21441512345200 is a wasteful number, since it uses less digits than its factorization.

21441512345200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18379274 (or 18379263 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 21441512345200 its reverse (254321514412), we get a palindrome (21695833859612).

The spelling of 21441512345200 in words is "twenty-one trillion, four hundred forty-one billion, five hundred twelve million, three hundred forty-five thousand, two hundred".