211042321 has 4 divisors (see below), whose sum is σ = 241191232. Its totient is φ = 180893412.

The previous prime is 211042297. The next prime is 211042387. The reversal of 211042321 is 123240112.

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 not a de Polignac number, because 211042321 - 2⁵ = 211042289 is a prime.

It is a super-2 number, since 2×211042321² = 89077722506134082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211042295 and 211042304.

It is not an unprimeable number, because it can be changed into a prime (211042121) 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, 15074445 + ... + 15074458.

It is an arithmetic number, because the mean of its divisors is an integer number (60297808).

Almost surely, 2^211042321 is an apocalyptic number.

It is an amenable number.

211042321 is a deficient number, since it is larger than the sum of its proper divisors (30148911).

211042321 is an equidigital number, since it uses as much as digits as its factorization.

211042321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30148910.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 211042321 is about 14527.2957221914. The cubic root of 211042321 is about 595.3739813986.

Adding to 211042321 its reverse (123240112), we get a palindrome (334282433).

The spelling of 211042321 in words is "two hundred eleven million, forty-two thousand, three hundred twenty-one".