21110012012001 has 48 divisors (see below), whose sum is σ = 31440515947200. Its totient is φ = 12494681256960.

The previous prime is 21110012011997. The next prime is 21110012012069. The reversal of 21110012012001 is 10021021001112.

It is not a de Polignac number, because 21110012012001 - 2² = 21110012011997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110012012071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 539919885 + ... + 539958981.

It is an arithmetic number, because the mean of its divisors is an integer number (655010748900).

Almost surely, 2^{21110012012001} is an apocalyptic number.

It is an amenable number.

21110012012001 is a deficient number, since it is larger than the sum of its proper divisors (10330503935199).

21110012012001 is a wasteful number, since it uses less digits than its factorization.

21110012012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48046 (or 48003 counting only the distinct ones).

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

Adding to 21110012012001 its reverse (10021021001112), we get a palindrome (31131033013113).

The spelling of 21110012012001 in words is "twenty-one trillion, one hundred ten billion, twelve million, twelve thousand, one".