21231431140043 has 8 divisors (see below), whose sum is σ = 22357789476000. Its totient is φ = 20122010523648.

The previous prime is 21231431139983. The next prime is 21231431140067. The reversal of 21231431140043 is 34004113413212.

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 21231431140043 - 2¹⁴ = 21231431123659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21231431139988 and 21231431140015.

It is not an unprimeable number, because it can be changed into a prime (21231431140243) 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, 4234427318 + ... + 4234432331.

It is an arithmetic number, because the mean of its divisors is an integer number (2794723684500).

Almost surely, 2^{21231431140043} is an apocalyptic number.

21231431140043 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21231431140043 is a deficient number, since it is larger than the sum of its proper divisors (1126358335957).

21231431140043 is a wasteful number, since it uses less digits than its factorization.

21231431140043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8468859781.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21231431140043 its reverse (34004113413212), we get a palindrome (55235544553255).

The spelling of 21231431140043 in words is "twenty-one trillion, two hundred thirty-one billion, four hundred thirty-one million, one hundred forty thousand, forty-three".