4020442001231 has 4 divisors (see below), whose sum is σ = 4020476716464. Its totient is φ = 4020407286000.

The previous prime is 4020442001201. The next prime is 4020442001239. The reversal of 4020442001231 is 1321002440204.

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 4020442001231 - 2¹⁴ = 4020441984847 is a prime.

It is a super-2 number, since 2×4020442001231² (a number of 26 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 = 4020442001197 and 4020442001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020442001239) 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, 17183315 + ... + 17415716.

It is an arithmetic number, because the mean of its divisors is an integer number (1005119179116).

Almost surely, 2^{4020442001231} is an apocalyptic number.

4020442001231 is a deficient number, since it is larger than the sum of its proper divisors (34715233).

4020442001231 is a wasteful number, since it uses less digits than its factorization.

4020442001231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34715232.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 4020442001231 its reverse (1321002440204), we get a palindrome (5341444441435).

The spelling of 4020442001231 in words is "four trillion, twenty billion, four hundred forty-two million, one thousand, two hundred thirty-one".