144221212021 has 4 divisors (see below), whose sum is σ = 144233926732. Its totient is φ = 144208497312.

The previous prime is 144221211977. The next prime is 144221212061. The reversal of 144221212021 is 120212122441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120212122441 = 1153 ⋅104260297.

It can be written as a sum of positive squares in 2 ways, for example, as 15157056996 + 129064155025 = 123114^2 + 359255^2 .

It is a cyclic number.

It is not a de Polignac number, because 144221212021 - 2¹¹ = 144221209973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144221211983 and 144221212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144221212061) 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, 6340326 + ... + 6363031.

It is an arithmetic number, because the mean of its divisors is an integer number (36058481683).

Almost surely, 2^144221212021 is an apocalyptic number.

It is an amenable number.

144221212021 is a deficient number, since it is larger than the sum of its proper divisors (12714711).

144221212021 is a wasteful number, since it uses less digits than its factorization.

144221212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12714710.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 144221212021 its reverse (120212122441), we get a palindrome (264433334462).

The spelling of 144221212021 in words is "one hundred forty-four billion, two hundred twenty-one million, two hundred twelve thousand, twenty-one".