211001112011021 has 4 divisors (see below), whose sum is σ = 211063667932572. Its totient is φ = 210938556089472.

The previous prime is 211001112010999. The next prime is 211001112011059. The reversal of 211001112011021 is 120110211100112.

211001112011021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 188754900216100 + 22246211794921 = 13738810^2 + 4716589^2 .

It is a cyclic number.

It is not a de Polignac number, because 211001112011021 - 2²² = 211001107816717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211001112010987 and 211001112011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211001112010021) 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, 31277955716 + ... + 31277962461.

It is an arithmetic number, because the mean of its divisors is an integer number (52765916983143).

Almost surely, 2^{211001112011021} is an apocalyptic number.

It is an amenable number.

211001112011021 is a deficient number, since it is larger than the sum of its proper divisors (62555921551).

211001112011021 is an equidigital number, since it uses as much as digits as its factorization.

211001112011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62555921550.

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

Adding to 211001112011021 its reverse (120110211100112), we get a palindrome (331111323111133).

It can be divided in two parts, 21100111 and 2011021, that added together give a palindrome (23111132).

The spelling of 211001112011021 in words is "two hundred eleven trillion, one billion, one hundred twelve million, eleven thousand, twenty-one".