211033111021 has 8 divisors (see below), whose sum is σ = 223483438584. Its totient is φ = 198586851840.

The previous prime is 211033111007. The next prime is 211033111063. The reversal of 211033111021 is 120111330112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 69875106921 + 141158004100 = 264339^2 + 375710^2 .

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

It is not a de Polignac number, because 211033111021 - 2¹¹ = 211033108973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211033110986 and 211033111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211033511021) 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, 909970 + ... + 1118083.

It is an arithmetic number, because the mean of its divisors is an integer number (27935429823).

Almost surely, 2^211033111021 is an apocalyptic number.

It is an amenable number.

211033111021 is a deficient number, since it is larger than the sum of its proper divisors (12450327563).

211033111021 is a wasteful number, since it uses less digits than its factorization.

211033111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034191.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 211033111021 its reverse (120111330112), we get a palindrome (331144441133).

The spelling of 211033111021 in words is "two hundred eleven billion, thirty-three million, one hundred eleven thousand, twenty-one".