210144323421 has 6 divisors (see below), whose sum is σ = 303541800510. Its totient is φ = 140096215608.

The previous prime is 210144323381. The next prime is 210144323461. The reversal of 210144323421 is 124323441012.

210144323421 is a `hidden beast` number, since 210 + 1 + 4 + 4 + 3 + 23 + 421 = 666.

It is an interprime number because it is at equal distance from previous prime (210144323381) and next prime (210144323461).

It can be written as a sum of positive squares in only one way, i.e., 210026057796 + 118265625 = 458286^2 + 10875^2 .

It is not a de Polignac number, because 210144323421 - 2⁷ = 210144323293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210144323461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11674684626 + ... + 11674684643.

It is an arithmetic number, because the mean of its divisors is an integer number (50590300085).

Almost surely, 2^210144323421 is an apocalyptic number.

It is an amenable number.

210144323421 is a deficient number, since it is larger than the sum of its proper divisors (93397477089).

210144323421 is a wasteful number, since it uses less digits than its factorization.

210144323421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23349369275 (or 23349369272 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 210144323421 its reverse (124323441012), we get a palindrome (334467764433).

The spelling of 210144323421 in words is "two hundred ten billion, one hundred forty-four million, three hundred twenty-three thousand, four hundred twenty-one".