210144021 has 8 divisors (see below), whose sum is σ = 296673984. Its totient is φ = 131855040.

The previous prime is 210144013. The next prime is 210144023. The reversal of 210144021 is 120441012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210144021 - 2³ = 210144013 is a prime.

It is a super-3 number, since 3×210144021³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210144023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2060185 + ... + 2060286.

It is an arithmetic number, because the mean of its divisors is an integer number (37084248).

Almost surely, 2^210144021 is an apocalyptic number.

It is an amenable number.

210144021 is a deficient number, since it is larger than the sum of its proper divisors (86529963).

210144021 is a wasteful number, since it uses less digits than its factorization.

210144021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4120491.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 210144021 is about 14496.3450910911. The cubic root of 210144021 is about 594.5280451114.

Adding to 210144021 its reverse (120441012), we get a palindrome (330585033).

The spelling of 210144021 in words is "two hundred ten million, one hundred forty-four thousand, twenty-one".