210433122421 has 4 divisors (see below), whose sum is σ = 215565637644. Its totient is φ = 205300607200.

The previous prime is 210433122379. The next prime is 210433122457. The reversal of 210433122421 is 124221334012.

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 100987941796 + 109445180625 = 317786^2 + 330825^2 .

It is a cyclic number.

It is not a de Polignac number, because 210433122421 - 2⁷ = 210433122293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210433122121) 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, 2566257550 + ... + 2566257631.

It is an arithmetic number, because the mean of its divisors is an integer number (53891409411).

Almost surely, 2^210433122421 is an apocalyptic number.

It is an amenable number.

210433122421 is a deficient number, since it is larger than the sum of its proper divisors (5132515223).

210433122421 is an equidigital number, since it uses as much as digits as its factorization.

210433122421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5132515222.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 210433122421 its reverse (124221334012), we get a palindrome (334654456433).

The spelling of 210433122421 in words is "two hundred ten billion, four hundred thirty-three million, one hundred twenty-two thousand, four hundred twenty-one".