42021321431 has 8 divisors (see below), whose sum is σ = 42497388000. Its totient is φ = 41545342080.

The previous prime is 42021321337. The next prime is 42021321473. The reversal of 42021321431 is 13412312024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42021321431 - 2¹⁴ = 42021305047 is a prime.

It is a super-2 number, since 2×42021321431² (a number of 22 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 = 42021321397 and 42021321406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021351431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1821851 + ... + 1844771.

It is an arithmetic number, because the mean of its divisors is an integer number (5312173500).

Almost surely, 2^42021321431 is an apocalyptic number.

42021321431 is a deficient number, since it is larger than the sum of its proper divisors (476066569).

42021321431 is a wasteful number, since it uses less digits than its factorization.

42021321431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43609.

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

Adding to 42021321431 its reverse (13412312024), we get a palindrome (55433633455).

The spelling of 42021321431 in words is "forty-two billion, twenty-one million, three hundred twenty-one thousand, four hundred thirty-one".