213220420112443 has 4 divisors (see below), whose sum is σ = 218420918164008. Its totient is φ = 208019922060880.

The previous prime is 213220420112389. The next prime is 213220420112459. The reversal of 213220420112443 is 344211024022312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213220420112443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213220420112143) 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, 2600249025721 + ... + 2600249025802.

It is an arithmetic number, because the mean of its divisors is an integer number (54605229541002).

Almost surely, 2^{213220420112443} is an apocalyptic number.

213220420112443 is a deficient number, since it is larger than the sum of its proper divisors (5200498051565).

213220420112443 is an equidigital number, since it uses as much as digits as its factorization.

213220420112443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200498051564.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 213220420112443 its reverse (344211024022312), we get a palindrome (557431444134755).

The spelling of 213220420112443 in words is "two hundred thirteen trillion, two hundred twenty billion, four hundred twenty million, one hundred twelve thousand, four hundred forty-three".