42143430021 has 64 divisors (see below), whose sum is σ = 71526260736. Its totient is φ = 21435148800.

The previous prime is 42143430011. The next prime is 42143430031. The reversal of 42143430021 is 12003434124.

It is an interprime number because it is at equal distance from previous prime (42143430011) and next prime (42143430031).

It is not a de Polignac number, because 42143430021 - 2¹⁰ = 42143428997 is a prime.

It is a super-3 number, since 3×42143430021³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42143429973 and 42143430000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42143430011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6375300 + ... + 6381906.

It is an arithmetic number, because the mean of its divisors is an integer number (1117597824).

Almost surely, 2^42143430021 is an apocalyptic number.

It is an amenable number.

42143430021 is a deficient number, since it is larger than the sum of its proper divisors (29382830715).

42143430021 is a wasteful number, since it uses less digits than its factorization.

42143430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7202.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 42143430021 its reverse (12003434124), we get a palindrome (54146864145).

The spelling of 42143430021 in words is "forty-two billion, one hundred forty-three million, four hundred thirty thousand, twenty-one".