143120221 has 2 divisors, whose sum is σ = 143120222. Its totient is φ = 143120220.

The previous prime is 143120209. The next prime is 143120231. The reversal of 143120221 is 122021341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85192900 + 57927321 = 9230^2 + 7611^2 .

It is a cyclic number.

It is not a de Polignac number, because 143120221 - 2⁹ = 143119709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143120195 and 143120204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143120231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71560110 + 71560111.

It is an arithmetic number, because the mean of its divisors is an integer number (71560111).

Almost surely, 2^143120221 is an apocalyptic number.

It is an amenable number.

143120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

143120221 is an equidigital number, since it uses as much as digits as its factorization.

143120221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 143120221 is about 11963.2863795865. The cubic root of 143120221 is about 523.0786562454.

Adding to 143120221 its reverse (122021341), we get a palindrome (265141562).

It can be divided in two parts, 143120 and 221, that added together give a palindrome (143341).

The spelling of 143120221 in words is "one hundred forty-three million, one hundred twenty thousand, two hundred twenty-one".