42312432021 has 16 divisors (see below), whose sum is σ = 57745934400. Its totient is φ = 27544003200.

The previous prime is 42312431989. The next prime is 42312432073. The reversal of 42312432021 is 12023421324.

It is a happy number.

It is not a de Polignac number, because 42312432021 - 2⁵ = 42312431989 is a prime.

It is a super-2 number, since 2×42312432021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42312431982 and 42312432000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42312432121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397371 + ... + 492471.

It is an arithmetic number, because the mean of its divisors is an integer number (3609120900).

Almost surely, 2^42312432021 is an apocalyptic number.

It is an amenable number.

42312432021 is a deficient number, since it is larger than the sum of its proper divisors (15433502379).

42312432021 is a wasteful number, since it uses less digits than its factorization.

42312432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98596.

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

Adding to 42312432021 its reverse (12023421324), we get a palindrome (54335853345).

The spelling of 42312432021 in words is "forty-two billion, three hundred twelve million, four hundred thirty-two thousand, twenty-one".