21001135104200 has 48 divisors (see below), whose sum is σ = 48846841102080. Its totient is φ = 8397150474560.

The previous prime is 21001135104197. The next prime is 21001135104227. The reversal of 21001135104200 is 240153110012.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20137424 + ... + 21154623.

It is an arithmetic number, because the mean of its divisors is an integer number (1017642522960).

Almost surely, 2^{21001135104200} is an apocalyptic number.

21001135104200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001135104200 is an abundant number, since it is smaller than the sum of its proper divisors (27845705997880).

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

21001135104200 is a wasteful number, since it uses less digits than its factorization.

21001135104200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41294606 (or 41294597 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 21001135104200 its reverse (240153110012), we get a palindrome (21241288214212).

The spelling of 21001135104200 in words is "twenty-one trillion, one billion, one hundred thirty-five million, one hundred four thousand, two hundred".