21112110211001 has 4 divisors (see below), whose sum is σ = 21119874873600. Its totient is φ = 21104345548404.

The previous prime is 21112110210931. The next prime is 21112110211013. The reversal of 21112110211001 is 10011201121112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112110211001 is a prime.

It is a super-2 number, since 2×21112110211001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112110219001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3882327221 + ... + 3882332658.

It is an arithmetic number, because the mean of its divisors is an integer number (5279968718400).

Almost surely, 2^{21112110211001} is an apocalyptic number.

It is an amenable number.

21112110211001 is a deficient number, since it is larger than the sum of its proper divisors (7764662599).

21112110211001 is an equidigital number, since it uses as much as digits as its factorization.

21112110211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7764662598.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21112110211001 its reverse (10011201121112), we get a palindrome (31123311332113).

The spelling of 21112110211001 in words is "twenty-one trillion, one hundred twelve billion, one hundred ten million, two hundred eleven thousand, one".