21110211001 has 8 divisors (see below), whose sum is σ = 23030769600. Its totient is φ = 19189893840.

The previous prime is 21110210987. The next prime is 21110211061. The reversal of 21110211001 is 10011201112.

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

It is a cyclic number.

It is not a de Polignac number, because 21110211001 - 2⁷ = 21110210873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110211061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156295 + ... + 258163.

It is an arithmetic number, because the mean of its divisors is an integer number (2878846200).

Almost surely, 2^21110211001 is an apocalyptic number.

It is an amenable number.

21110211001 is a deficient number, since it is larger than the sum of its proper divisors (1920558599).

21110211001 is a wasteful number, since it uses less digits than its factorization.

21110211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120719.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21110211001 its reverse (10011201112), we get a palindrome (31121412113).

The spelling of 21110211001 in words is "twenty-one billion, one hundred ten million, two hundred eleven thousand, one".