143321021031 has 4 divisors (see below), whose sum is σ = 191094694712. Its totient is φ = 95547347352.

The previous prime is 143321021009. The next prime is 143321021057. The reversal of 143321021031 is 130120123341.

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

It is not a de Polignac number, because 143321021031 - 2⁶ = 143321020967 is a prime.

It is a super-2 number, since 2×143321021031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143321020989 and 143321021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143321021131) 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, 23886836836 + ... + 23886836841.

It is an arithmetic number, because the mean of its divisors is an integer number (47773673678).

Almost surely, 2^143321021031 is an apocalyptic number.

143321021031 is a deficient number, since it is larger than the sum of its proper divisors (47773673681).

143321021031 is an equidigital number, since it uses as much as digits as its factorization.

143321021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47773673680.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 143321021031 its reverse (130120123341), we get a palindrome (273441144372).

The spelling of 143321021031 in words is "one hundred forty-three billion, three hundred twenty-one million, twenty-one thousand, thirty-one".