143520121331 has 4 divisors (see below), whose sum is σ = 143523131232. Its totient is φ = 143517111432.

The previous prime is 143520121259. The next prime is 143520121373. The reversal of 143520121331 is 133121025341.

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

It is a cyclic number.

It is not a de Polignac number, because 143520121331 - 2¹⁴ = 143520104947 is a prime.

It is a super-2 number, since 2×143520121331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143520121331.

It is not an unprimeable number, because it can be changed into a prime (143520121391) 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, 1432256 + ... + 1529181.

It is an arithmetic number, because the mean of its divisors is an integer number (35880782808).

Almost surely, 2^143520121331 is an apocalyptic number.

143520121331 is a deficient number, since it is larger than the sum of its proper divisors (3009901).

143520121331 is an equidigital number, since it uses as much as digits as its factorization.

143520121331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009900.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 143520121331 its reverse (133121025341), we get a palindrome (276641146672).

The spelling of 143520121331 in words is "one hundred forty-three billion, five hundred twenty million, one hundred twenty-one thousand, three hundred thirty-one".