143120232221 has 4 divisors (see below), whose sum is σ = 143130160092. Its totient is φ = 143110304352.

The previous prime is 143120232217. The next prime is 143120232251. The reversal of 143120232221 is 122232021341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122232021341 = 3167 ⋅38595523.

It can be written as a sum of positive squares in 2 ways, for example, as 94670059225 + 48450172996 = 307685^2 + 220114^2 .

It is a cyclic number.

It is not a de Polignac number, because 143120232221 - 2² = 143120232217 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 (143120232251) 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, 4942280 + ... + 4971153.

It is an arithmetic number, because the mean of its divisors is an integer number (35782540023).

Almost surely, 2^143120232221 is an apocalyptic number.

It is an amenable number.

143120232221 is a deficient number, since it is larger than the sum of its proper divisors (9927871).

143120232221 is an equidigital number, since it uses as much as digits as its factorization.

143120232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9927870.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 143120232221 its reverse (122232021341), we get a palindrome (265352253562).

The spelling of 143120232221 in words is "one hundred forty-three billion, one hundred twenty million, two hundred thirty-two thousand, two hundred twenty-one".