211120330021 has 4 divisors (see below), whose sum is σ = 212026426092. Its totient is φ = 210214233952.

The previous prime is 211120330013. The next prime is 211120330027. The reversal of 211120330021 is 120033021112.

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 27859281921 + 183261048100 = 166911^2 + 428090^2 .

It is a cyclic number.

It is not a de Polignac number, because 211120330021 - 2³ = 211120330013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211120329977 and 211120330004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211120330027) 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, 453047686 + ... + 453048151.

It is an arithmetic number, because the mean of its divisors is an integer number (53006606523).

Almost surely, 2^211120330021 is an apocalyptic number.

It is an amenable number.

211120330021 is a deficient number, since it is larger than the sum of its proper divisors (906096071).

211120330021 is an equidigital number, since it uses as much as digits as its factorization.

211120330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906096070.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 211120330021 its reverse (120033021112), we get a palindrome (331153351133).

The spelling of 211120330021 in words is "two hundred eleven billion, one hundred twenty million, three hundred thirty thousand, twenty-one".