144210021 has 4 divisors (see below), whose sum is σ = 192280032. Its totient is φ = 96140012.

The previous prime is 144209987. The next prime is 144210029. The reversal of 144210021 is 120012441.

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 a cyclic number.

It is not a de Polignac number, because 144210021 - 2⁷ = 144209893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144210029) 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, 24035001 + ... + 24035006.

It is an arithmetic number, because the mean of its divisors is an integer number (48070008).

Almost surely, 2^144210021 is an apocalyptic number.

It is an amenable number.

144210021 is a deficient number, since it is larger than the sum of its proper divisors (48070011).

144210021 is an equidigital number, since it uses as much as digits as its factorization.

144210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48070010.

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

The square root of 144210021 is about 12008.7476865825. The cubic root of 144210021 is about 524.4029748406.

Adding to 144210021 its reverse (120012441), we get a palindrome (264222462).

The spelling of 144210021 in words is "one hundred forty-four million, two hundred ten thousand, twenty-one".