143020545221 has 4 divisors (see below), whose sum is σ = 146508851244. Its totient is φ = 139532239200.

The previous prime is 143020545121. The next prime is 143020545251. The reversal of 143020545221 is 122545020341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10989328900 + 132031216321 = 104830^2 + 363361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143020545221 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 (143020545251) 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, 1744152950 + ... + 1744153031.

It is an arithmetic number, because the mean of its divisors is an integer number (36627212811).

Almost surely, 2^143020545221 is an apocalyptic number.

It is an amenable number.

143020545221 is a deficient number, since it is larger than the sum of its proper divisors (3488306023).

143020545221 is an equidigital number, since it uses as much as digits as its factorization.

143020545221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488306022.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 143020545221 its reverse (122545020341), we get a palindrome (265565565562).

The spelling of 143020545221 in words is "one hundred forty-three billion, twenty million, five hundred forty-five thousand, two hundred twenty-one".