21001120201110 has 96 divisors (see below), whose sum is σ = 61190807351040. Its totient is φ = 4517888030208.

The previous prime is 21001120201069. The next prime is 21001120201121. The reversal of 21001120201110 is 1110202110012.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 172958920 + ... + 173080299.

It is an arithmetic number, because the mean of its divisors is an integer number (637404243240).

Almost surely, 2^{21001120201110} is an apocalyptic number.

21001120201110 is an abundant number, since it is smaller than the sum of its proper divisors (40189687149930).

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

21001120201110 is a wasteful number, since it uses less digits than its factorization.

21001120201110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346039270 (or 346039253 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21001120201110 its reverse (1110202110012), we get a palindrome (22111322311122).

The spelling of 21001120201110 in words is "twenty-one trillion, one billion, one hundred twenty million, two hundred one thousand, one hundred ten".