21233142420043 has 4 divisors (see below), whose sum is σ = 21233642807520. Its totient is φ = 21232642032568.

The previous prime is 21233142420019. The next prime is 21233142420121. The reversal of 21233142420043 is 34002424133212.

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 21233142420043 - 2³⁷ = 21095703466571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21233142419987 and 21233142420014.

It is not an unprimeable number, because it can be changed into a prime (21233142420943) 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, 250130083 + ... + 250214956.

It is an arithmetic number, because the mean of its divisors is an integer number (5308410701880).

Almost surely, 2^{21233142420043} is an apocalyptic number.

21233142420043 is a deficient number, since it is larger than the sum of its proper divisors (500387477).

21233142420043 is an equidigital number, since it uses as much as digits as its factorization.

21233142420043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500387476.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 21233142420043 its reverse (34002424133212), we get a palindrome (55235566553255).

The spelling of 21233142420043 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred forty-two million, four hundred twenty thousand, forty-three".