21240210411200 has 168 divisors, whose sum is σ = 57019596196800. Its totient is φ = 7723155686400.

The previous prime is 21240210411151. The next prime is 21240210411221. The reversal of 21240210411200 is 211401204212.

It is a super-2 number, since 2×21240210411200² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304427519 + ... + 304497281.

Almost surely, 2^{21240210411200} is an apocalyptic number.

21240210411200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21240210411200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28509798098400).

21240210411200 is an abundant number, since it is smaller than the sum of its proper divisors (35779385785600).

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

21240210411200 is a wasteful number, since it uses less digits than its factorization.

21240210411200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87095 (or 87080 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21240210411200 its reverse (211401204212), we get a palindrome (21451611615412).

The spelling of 21240210411200 in words is "twenty-one trillion, two hundred forty billion, two hundred ten million, four hundred eleven thousand, two hundred".