21210112011001 has 8 divisors (see below), whose sum is σ = 22412446375680. Its totient is φ = 20031123944832.

The previous prime is 21210112010957. The next prime is 21210112011013. The reversal of 21210112011001 is 10011021101212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21210112011001 - 2²⁷ = 21209977793273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210112011071) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5836572760 + ... + 5836576393.

It is an arithmetic number, because the mean of its divisors is an integer number (2801555796960).

Almost surely, 2^{21210112011001} is an apocalyptic number.

It is an amenable number.

21210112011001 is a deficient number, since it is larger than the sum of its proper divisors (1202334364679).

21210112011001 is a wasteful number, since it uses less digits than its factorization.

21210112011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11673149255.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21210112011001 its reverse (10011021101212), we get a palindrome (31221133112213).

The spelling of 21210112011001 in words is "twenty-one trillion, two hundred ten billion, one hundred twelve million, eleven thousand, one".