143442220021 has 8 divisors (see below), whose sum is σ = 148477462200. Its totient is φ = 138412908480.

The previous prime is 143442220007. The next prime is 143442220037. The reversal of 143442220021 is 120022244341.

It can be written as a sum of positive squares in 4 ways, for example, as 60059304900 + 83382915121 = 245070^2 + 288761^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 143442220021 - 2²³ = 143433831413 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 (143442220321) 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, 1433410 + ... + 1530211.

It is an arithmetic number, because the mean of its divisors is an integer number (18559682775).

Almost surely, 2^143442220021 is an apocalyptic number.

It is an amenable number.

143442220021 is a deficient number, since it is larger than the sum of its proper divisors (5035242179).

143442220021 is a wasteful number, since it uses less digits than its factorization.

143442220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965319.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 143442220021 its reverse (120022244341), we get a palindrome (263464464362).

The spelling of 143442220021 in words is "one hundred forty-three billion, four hundred forty-two million, two hundred twenty thousand, twenty-one".