4020321311042 has 4 divisors (see below), whose sum is σ = 6030481966566. Its totient is φ = 2010160655520.

The previous prime is 4020321311033. The next prime is 4020321311087. The reversal of 4020321311042 is 2401131230204.

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

It can be written as a sum of positive squares in only one way, i.e., 3183829980241 + 836491330801 = 1784329^2 + 914599^2 .

It is a super-2 number, since 2×4020321311042² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4020321310999 and 4020321311017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005080327759 + ... + 1005080327762.

Almost surely, 2^{4020321311042} is an apocalyptic number.

4020321311042 is a deficient number, since it is larger than the sum of its proper divisors (2010160655524).

4020321311042 is a wasteful number, since it uses less digits than its factorization.

4020321311042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010160655523.

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

Adding to 4020321311042 its reverse (2401131230204), we get a palindrome (6421452541246).

The spelling of 4020321311042 in words is "four trillion, twenty billion, three hundred twenty-one million, three hundred eleven thousand, forty-two".