143201021 has 4 divisors (see below), whose sum is σ = 143229372. Its totient is φ = 143172672.

The previous prime is 143200991. The next prime is 143201027. The reversal of 143201021 is 120102341.

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 91202500 + 51998521 = 9550^2 + 7211^2 .

It is a cyclic number.

It is not a de Polignac number, because 143201021 - 2⁶ = 143200957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143200987 and 143201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143201027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4310 + ... + 17463.

It is an arithmetic number, because the mean of its divisors is an integer number (35807343).

Almost surely, 2^143201021 is an apocalyptic number.

It is an amenable number.

143201021 is a deficient number, since it is larger than the sum of its proper divisors (28351).

143201021 is an equidigital number, since it uses as much as digits as its factorization.

143201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28350.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 143201021 is about 11966.6629015779. The cubic root of 143201021 is about 523.1770742140.

Adding to 143201021 its reverse (120102341), we get a palindrome (263303362).

The spelling of 143201021 in words is "one hundred forty-three million, two hundred one thousand, twenty-one".