211033310302021 has 6 divisors (see below), whose sum is σ = 224177253504530. Its totient is φ = 198619586166336.

The previous prime is 211033310302019. The next prime is 211033310302103. The reversal of 211033310302021 is 120203013330112.

It can be written as a sum of positive squares in 3 ways, for example, as 32783067922500 + 178250242379521 = 5725650^2 + 13351039^2 .

It is not a de Polignac number, because 211033310302021 - 2¹ = 211033310302019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211033310301983 and 211033310302001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211033310302621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 365109533106 + ... + 365109533683.

Almost surely, 2^{211033310302021} is an apocalyptic number.

It is an amenable number.

211033310302021 is a deficient number, since it is larger than the sum of its proper divisors (13143943202509).

211033310302021 is an equidigital number, since it uses as much as digits as its factorization.

211033310302021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730219066823 (or 730219066806 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 211033310302021 its reverse (120203013330112), we get a palindrome (331236323632133).

The spelling of 211033310302021 in words is "two hundred eleven trillion, thirty-three billion, three hundred ten million, three hundred two thousand, twenty-one".